NEET Biology Chapter Wise Mock Test – Neural Control and Chemical Coordination
1. The homeostatic regulation of an animal requires three basic components ………. to detect changes, …… to evaluate the changes and ……… to adjust the changes respectively.
Fill in the blanks with correct option.
(a) receptor, affectors, effectors
(b) brain, spinal cord, effectors
(c) receptors, integrators, effectors
(d) receptors, integrators, effectors
2. Integration system in the body is
(a) nervous system and respiratory system
(b) endocrine system and circulatory system
(c) circulatory system and digestive system
(d) nervous and endocrine system
3. A hormone is best described as
(a) an internal secretion that is transported through ducts
(b) an internal secretion with many effects
(c) a chemical secreted by a gland
(d) a chemical produced in one part of the body that is transported in the blood to another place, where it acts in a regulatory capacity
4. Which one of the following statements is correct?
(a) Neurons regulate endocrine activity, but not vice-versa
(b) Endocrine glands regulate neural activity and nervous system regulates endocrine glands
(c) Neither hormones control neural activity nor the neurons control endocrine activity
(d) Endocrine glands regulate neural activity, but not vice-versa
5. The main functions of sympathetic nervous system are
(a) the contraction of skin blood vessels and sudden increase of blood pressure
(b) contraction of muscles, secretion of sweat glands and rapid coagulation of blood
(c) dilation of bronchi, contraction of heart and sudden decrease in the number of RBCs in the blood
(d) All of the above
6. Node of Ranvier occurs where
(a) nerve is covered with myelin sheath
(b) neurilemma is discontinuous
(c) neurilemma and myelin sheath are discontinuous
(d) myelin sheath is discontinuous
7. CNS is mostly made up of
(a) motor neurons and sensory neurons
(b) sensory neurons and association
(c) association neurons
(d) motor neurons and association neurons
8. Which of the following is an accumulation and release centre of neurohormones?
(a) Posterior pituitary lobe
(b) Intermediate lobe of the pituitary
(c) Hypothalamus
(d) Anterior pituitary lobe
9. The nerve centres, which controls the body temperature and the urge for eating are contained in
(a) hypothalamus
(b) pons e
(c) cerebellum
(d) thalamus
10. Cerebro Spinal Fluid (CSF) is found within the
(a) epidural space, subarachnoid space and dural sinuses
(b) the subarachnoid space, dural sinuses and ventricles
(c) central canal, epidbral space and subarachnoid space
(d) ventricles, central canal and subarachnoid space
11. Regarding cerebrospinal fluid, which of the following is a false statement?
(a) It has a specific gravity of 1.007
(b) It maintains a volume of 140-200 mL and a fluid pressure of 10 mm Hg
(c) It moves metabolic wastes away from the cells of nervous tissue
(d) It is produced in the choroid plexuses and get drains into the cerebral arterial circle
12. Which of the following is not a function of the ANS?
(a) Innervation of all visceral organs ,
(b) Transmission of sensory and motor impulses
(c) Regulation and control of vital activities
(d) Conscious control of motor activities
13. Which of the following are the three initial developmental regions of the brain?
(a) Telencephalon, prosencephalon, rhombencephalon
(b) Rhombencephalon, prosencephalon, mesencephalon
(c) Metencephalon, myelencephalon, prosencephalon
(d) Prosencephalon, diencephalon, mesencephalon
14. Centre for sense of smell is
(a) cerebellum
(b) olfactory lobes
(c) cerebrum
(d) midbrain
15. Sequence of meninges from inner to outside is
(a) duramater—arachnoid—piamater
(b) duramater—piamater—arachnoid
(c) arachnoid—duramater—piamater
(d) piamater—arachnoid—duramater
16. The cranial nerve which is showing the maximum branching is
(a) trigeminal
(b) vagus
(c) optic
(d) facial
17. Vagus nerve is
(a) X
(b) IX
(c) VII
(d) V
18. Excessive stimulation of vagus nerve may lead to
(a) hoarse voice
(b) peptic ulcers
(c) efficient digestion of proteins
(d) irregular contraction of diaphragm
19. 9th pair of cranial nerve in frog is
(a) hypoglossal
(b) glossopharyngeal
(c) vagus
(d) trigeminal
20. Injury to vagus nerve in human is not likely to affect
(a) tongue movements
(b) gastrointestinal movements
(c) pancreatic secretion
(d) cardiac movements
21. Which of the following is not cprrect about frog?
(a) RBCs are nucleated and contain haemoglobin
(b) Twelve pairs of cranial nerves are present
(c) Sense organs like organ of touch (sensory papillae), taste (taste buds), smell (nasal epithelium), vision (eyes) and hearing (tympanum with internal ears) are present
(d) Nervous system is organise,d,jntp,central, peripheral and autonomic
22. Which pairing of nerve and organ innervation is incorrect?
(a) Phrenic nerve — Diaphragm
(b) Vagus nerve — Abdominal viscera
(c) Glossopharyngeal nerve — Taste buds
(d) Abducens nerve — Facial muscles
23. Which one of the following is an example of negative feedback loop in humans?
(a) Constriction of skin, blood vessels and contraction of skeletal muscles, when it is too cold
(b) Secretion of tears after falling of sand particles into the eye
(c) Salivation of mouth at the sight of delicious food
(d) Secretion of sweat glands and construction of skin blood vessels, when it is too hot
24. Sympathetic nervous system increases
(a) heartbeat
(b) secretion of saliva
(c) secretion of digestive juices
(d) All of the above
25. One reason for the division of the ANS is that
(a) sympathetic signals are transmitted from the spinal cord to the periphery through two successive neurons, in contrast to one neuron for parasympathetic signals
(b) sympathetic fibres alone innervate organs in the abdominal cavity
(c) sympathetic fibres alone arise from the spinal cord
(d) the effects of the two divisions on the organs are usually antagonistic
26. The function of our visceral organs is controlled by
(a) sympathetic and somatic neural system
(b) sympathetic and parasympathetic neural system
(c) central and somatic nervous system
(d) None of the above
27. Resting membrane potential is maintained by
(a) hormones
(b) neurotransmitters
(c) ion pumps
(d) None of these
28. Potential difference across resting membrane is negatively charged. This is due to differential distribution of the following ions.
29. An action potential in the nerve fibre is produced when positive and negative charges on the outside and the inside of the axon membrane are reversed because
(a) more potassium ions enter the axon as compared to sodium ions leaving it
(b) more sodium ions enter the axon as compared to potassium ions leaving it
(c) all potassium ions leave the axon
(d) all sodium ions enter the axon
30. Na+- K+ pump is found in membranes of many cells, like nerve cells. It works against electro chemical gradient and involves an integral protein ATPase. For each molecule of ATP used
(a) 3 ions of Na+ are pumped out and 2 ions of K+ are taken in
(b) 3 ions of Na+Y89 are taken in and 2 ions of K+ are pumped out
(c) 2 ions of Na+ are thrown out and 3 ions of K+ are absorbed
(d) 3 ions of K+ are absorbed and 3 ions of Na+ are pumped out
31. Unidirectional transmission of a nerve impulse through nerve fibre is due to the fact that
(a) nerve fibre is insulated by a medullary
(b) sodium pump starts operating only at the cyton and then continues into the nerve fibre
(c) neurotransmitters are released by dendrites and not by axon endings
(d) neurotransmitters are released by the axon endings and not by dendrites
32. Nerve impulse travels as
(a) mechanical impulse
(b) chemical impulse
(c) electrical impulse
(d) magnetic impulse
33. In the resting state of the neural membrane, diffusion due to concentration gradients, allowed would drive
(a) K+ into the cell
(b) K+ and Ka+ out of the cell
(c) Na+ into the cell
(d) Na+ out of the cell
34. During the transmission of nerve impulse through a nerve fibre, the potential on the inner side of the plasma membrane has which type of electric charge?
(a) First negative, then positive and again back to negative
(b) First positive, then negative and continue to be negative
(c) First negative, then positive and continue to be positive
(d) First positive, then negative and again back to positive
35. Parkinson’s disease (characterised by tremors and progressive rigidity of limbs) is caused by degeneration of brain neurons that are involved in movement control and make use of neurotransmitter
(a) acetylcholine
(b) norepinephrine
(c) dopamine
(d) GABA
36. The part of internal ear responsible for hearing is
(a) cochlea
(b) semicircular canal
(c) utriculus
(d) sacculus
37. Chemicals which are released at the synaptic junction are called
(a) hormones
(b) neurotransmitters
(c) cerebrospinal fluid
(d) lymph
38. Identify the parts labelled as A to E and choose the correct option for the given diagrammatic representation of reflex, action showing knee-jerk reflex.
(a) A-Dorsal root ganglion, C-Gray matter, E-Efferent pathway
(b) A-Dorsal root ganglion, C-Gray matter, E-Afferent pathway
(c) A-Dorsal root ganglion, C-White matter, E-Afferent pathway
(d) A-Ventral root ganglion, C-Gray matter, E-Afferent pathway
39. Human eyeball consists of three layers and it encloses
(a) lens, iris, optic nerve
(b) lens, aqueous humor and vitreous humor
(c) cornea, lens, iris
(d) cornea, lens, optic nerve
40. Mark the vitamin present in rhodopsin
(a) vitamin-A
(b)vitamin-B
(c) vitamin-C
(d) vitamin-D
41. In a similarity with photographic camera, retina acts astrong>
(a) shutter
(b) lens
(c) diaphragm
(d) film
42. Ora serrata is
(a) part of retina
(b) present in utriculus of ear
(c) gland present in oral cavity of frog
(d) oral cavity of protochordates
43. Which one is photosensitive in mammals?
(a) Retinol
(b) Rhodopsin
(c) Melanin
(d)Sclerotin
44. The point in eye of mammals from which optic nerves and blood vessels leave the eye ball is
(a) yellow spot
(b) blind spot
(c) pars optica
(d) None of the above
45. Merkel’s discs take^art in perceiving the sensation of
(a) pressure
(b) cold
(c) heat
(d) constant touch and its localisation
46. Cornea transplantation is successful as cornea is
(a) easily available
(b) without blood supply
(c) easily preserved” ‘
(d) easily stiched
47. In the blind spot, where the optic nerves leave the eyes
(a) rods and cones are absent
(b) only cones are present
(c) only rods are present
(d) special neurons are present
48. A characteristic of human cornea
(a) is absence of blood circulation
(b) is generation cataract in old age
(c) has lacrimal gland for secretion of tears
(d) is secreted by conjunctiva and glandular layer
49. Examine the diagram of the two cell types A and B given adjacent and select the correct option
(a) cell A is the rod cell found evenly all over retina
(b) cell A is the cone cell more concentrated in the fovea centralis
(c) cell B is concerned with colour vision in bright light
(d) cell A is sensitive to low light intensities
50. The defective condition of eye, in which distant objects are seen distinct but near objects are indistinct is called .
(a) myopia
(b) astigmatism
(c) presbyopia
(d) hypermetropia
51. In myopia or short sightedness
(a) image is formed slightly in front of retina because eye ball is longer
(b) eye ball is normal but image is formed over blind spot
(e) eye ball is normal but image is formed slightly behind the retina due to faulty lens
(d) curvature of cornea becomes irregular
52. Mark the vitamin present in rhodopsin
(a) vitamin-A
(b) v.itamin-B
(c) vitamin-C
(d) vitamin-D
53. The organ of Corti is a structure present in
(a) external ear
(b) middle ear
(c) semi circular canal
(d)cochlea
54. Static balance is maintained by
(a) maculae
(b) cristae
(c) organ of Corti
(d) Reissner’s membrane
55. Dynamic balance is maintained by
(a) maculae
(b) cristae
(c) organ of Corti
(d) Reissner’s membrane
56. Wax gland present in the ear canal is called
(a) sweat gland
(b) prostate gland
(c) Cowper’s gland
(d) sebaceous gland/ceruminous’giand
57. Internal ear is filled with
(a) perilymph
(b) endolymph
(c) lymph
(d) Both (a) and (b)
58. Below is the diagram of the sectional view of cochlea of human ear. Identify A to £
Choose the correct option.
(a) A-Scala media, B-Organ of Corti, C-Basiliar membrane, D-Scala tympa’ni, E-Scala vestibuli
(b) A-Scala vestibuli, B-Organ of Corti, C-Basiliar membrane, D-Scala tympani, E-Scala media
(c) A-Scala vestibuli, B-Basiliar membrane, C-Organ of Corti, D-Scala tympani, E-Scala media
(d) A-Scala vestibuli, B-Basiliar membrane, C-Scala tympani, D-Organ of Corti, E-Scala media
59.Given is the diagram of ear.Identify A to H
Choose the correct option.
(a) A-Temporal bone, B-Malleus, C-Incus, D-Stapes, E-Cochlea, F-Egstachian tube, G-Tympanic membrane, H-External auditory canal
(b) A-Tympanic membrane, B-Malleus, C-Incus, D-Stapes, E-Cochlea, F-Eustachian tube, G-Temporal bone, FI-External auditory canal
(c) A-Tympanic membrane, B-Incus, C-Malleus, D-Stapes, E-Cochlea, F-Eustachian tube, G-Temporal bone, FI-External auditory canal
(d) A-Temporal bone, B-Malleus, C -Incus, D-Cochlea, E-Stapes, F-Eustachian tube, G-tympanic membrane, FI-External auditory canal
60. Which of the following is not involved in knee-jerk reflex?
(a) Muscle spindle
(b) Motor neuron
(c) Brain
(d) Inter neurons
61. Which one of the following pairs correctly matches a hormone with a disease resulting from its deficiency?
(a) Luteinising hormone — Failure of ovulation
(b) Insulin — Diabetes insipidus
(c) Thyroxine — Tetany
(d) Parathyroid hormone — Diabetes mellitus
62. Chemically hormones are
(a) biogenic amines
(b) proteins
(c) steroids
(d) All of these
63. The hormone, which brings about the contraction of . gall bladder is
(a) oxytocin
(b) gastrin
(c) cholecystokinin
(d) secretin
64.Pars nervosa is a part of
(a) brain
(b) spinal cord
(c) pituitary gland
(d) pineal gland
65.Acromegaly is caused by
(a) hypersecretion of FSH
(b) hyposecretion of ACTH
(c) hypersecretion of GH
(d) hyposecretion of GH/STH
66.While dwarfs and cretins are somewhat of the same height, the main difference is that
(a) dwarfs have normal intelligence, while cretins do not
(b) cretins are mentally deranged
(c) the head of cretin is especially large
(d) the dwarfs have elongated chin
67.Hormone that promotes cell division, protein synthesis and bone growth is
(a) ADH
(b) ACTH
(c) PTH
(d)GH
68.If a person takes large amount of water, the amount of ADH in blood will ,
(a) increase
(b) decrease
(c) first increase then decrease
(d) will remain unchanged
69.Melanocyte Stimulating Hormone (MSH) is produced by
(a) anterior pituitary
(b) posterior pituitary
(c) pars intermedia of pituitary
(d) parathyroid
70.Stimulation of the mother’s nipples by a nursing baby initiates a sensory impulses, which pass into the central nervous system and eventually reach the hypothalamus. These impulses result in
(a) synthesis and release of prolactin from the posterior pituitary
(b) release of lactogenic hormone from the anterior pituitary
(c) release of oxytocin from the posterior pituitary
(d) release of prolactin inhibiting factor
71.Ovulation is stimulated by
(a) LH
(b) FSH
(c) oestrogen
(d) progesterone
72.Pituitary gland is crushed and injected in frog. Frog will
(a) start laying eggs almost immediately
(b) change colour
(c) undergo metamorphosis
(d) die
73.Sertoli cells are regulated by the pituitary hormone known as
(a) FSH
(b) GH
(c) Prolactin
(d) LH
75. Adrenocorticotropin is a hormone, which is produced from
(a) pituitary
(b) adrenal
(c) thyroid
(d) adrenal medulla
76. Function of ACTH is to
(a) stimulate pituitary
(b) stimulate the adrenal cortex to produce hormones
(c) suppress the activity of adrenal cortex
(d) stimulate thyroid
77. The gonadotropic hormone is secreted by
(a) posterior part of thyrbid
(b) adrenal cortex
(c) adenohypophysis of pituitary
(d) interstitial cells of testes
78. Hormone oxytocin controls
(a) growth
(b) lactation
(c) child birth
(d) Both (b) and (c)
79. A person passes excessive urine and drinks much water but his glucose level is normal. It is due to
(a) increased secretion of glucagon
(b) fall in glucose released in urine
(c) reduction in insulin secretion
(d) reduction in vasopressin secretion in posterior pituitary
80. Source of somatostatin is the same as that of
(a) insulin and glucagon
(b) vasopressin and oxytocin
(c) thyroxin and calcitonin
(d) somatotropin and prolactin
81. The portion of the pituitary gland that arises from the roof of the primitive oral cavity is the
(a) adenohypophysis
(b) pars nervosa
(c) neurohypophysis
(d) infundibulum
82. Somatostatin is secreted by
(a) pituitary
(b) thyroid
(c) pineal
(d) hypothalamus
83. The one used for treatment of thyroid cancer is
(a) Ra224
(b) I131
(c) U238
(d)C14
84. Damage to thymus in a child may lead to
(a) a reduction in haemoglobin content of blood
(b) a reduction in stem cell production
(c) loss of antibody mediated immunity
(d) loss of cell mediated immunity .
85. Hormones thyroxin, adrenalin and pigment melanin are formed from
(a) glycine
(b) tryptophan
(c) tyrosine
(d) proline
86. Which endocrine gland stores its secretion in extracellular spaces before discharging into blood?
(a) Testes
(b) Pancreas
(c) Thyroid
(d) Adrenal
87. Thyrocalcitonin
(a) elevates K+ level in blood
(b) lowers Ca2+ level in blood
(c) elevates Ca2+ level in blood
(d) None of the above
88. Hormone controlling metabolism is
(a) ACTH from pituitary
(b) FSH from pituitary
(c) thyroxin from thyroid
(d) adrenalin from adrenal medulla
89. Which of the following diseases is not related to thyroid gland?
(a) Myxoedema
(b) Acromegaly
(c) Cretinism
(d) Goitre
90. A person has protruding eyes, tachycardia and higher body temperature. He is suffering from
(a) cretinism
(b) hyperthyroidism
(c) diabetes
(d) acromegaly
91. The excessive amount of calcium is regulated by
(a) thyroxin
(b) calcitonin
(c) epinephrine
(d) progesterone
92. A person is having problems with calcium and phosphorus metabolism in his body. Which one of the following glands may not be functioning properly?
(a) Parathyroid
(b) Parotid
(c) Pancreas
(d)Thyroid
93. Which one is correctly matched?
(a) Relaxin — Gigantism
(b) Prolactin — Cretinism
(c) Parathyroid hormone — Tetany
(d) Insulin — Diabetes insipidus
94. Which of the following is correct about pancreas?
(a) Pancreas is mixed gland
(b) Exocrine portion of pancreas secretes an alkaline pancreatic juice containing enzymes
(c) Endocrine portion of pancreas secretes insulin and glucagon
(d) All of the above
95. Which of the following does not match?
(a) Pancreas — Glisson’s capsule
(b) Antigen — Antibody
(c) Thyroid — Goitre
(d) Enzyme — Substrate
96. Ca2+ level is controlled by
(a) thyroid
(b) hypothalamus
(c) pituitary
(d) thyroid and parathyroid
97. Which of the following takes part in salt balancing?
(a) Mineralocorticoid
(b) Glucocorticoid
(c) Somatotropin
(d) Follitropin
98. Which one of the following is an emergency gland?
(a) Testes
(b) Adrenal
(c) Thymus
(d) Pituitary
99. Which one of the following is correctly matched pair of the given secretion and its primary role in human physiology?
(a) Sebum — Sexual attraction
(b) Sweat — Thermoregulation
(c) Saliva — Tasting food
(d) Tears — Excretion of salts
100. Adrenaline affects directly
(a) p-cells of Langerhans
(b) epithelial cells of stomach
(c) SA-node
(d) dorsal root of spinal nerve
101. Which one of the following does not act as a neurotransmitter?
(a) Acetylcholine
(b) Epinephrine
(c)Norepinephrine
(d) Cortisone
102. A steroid hormone, which regulates glucose metabolism is
(a) cortisol
(b) corticosterone
(c) 1,1-deoxycorticosterone
(d) cortisone
103. Renin is
(a) an enzyme present in the gastric juice of mammals
(b) a substance excreted through the kidney
(c) a protein produced by some cells present in the cortex of kidney
(d) None of the above
104. Epinephrine is secreted from
(a) adrenal medulla and decreases heart beat
(b) adrenal medulla and increases heart beat
(c) pancreas and increases heart beat
(d) pancreas and decreases heart beat
105. Which hormone causes dilation of blood vessels, increased oxygen consumption and glycogenolysis?
(a) ACTH
(b) Insulin
(c) Adrenaline
(d) Glucagon
106. Which of the following is not a steroid hormone?
(a) Oestrogen
(b) Cortisone
(c) Adrenaline
(d) Testosteron
107. The endocrine gland that is formed from two different germ layers is the
(a) ovary
(b) thyroid gland
(c) pancreas
(d) adrenal gland
108. The group of adrenocortical hormones concerned with electrolyte balance is the
(a) glucocorticoids
(b) mineralocorticoids
(c) androgens
(d) epinephrine and norepinephrine
109.Deficiency of the adrenal cortex activity leads to
(a) Cushing disease
(b) Conn’s syndrome
(c) Addison’s disease
(d) Simmond’s disease
110.The hormone produced in allergic reactions is
(a) glucocorticoid
(b) mineralocorticoid
(c) norepinephrine
(d) epinephrine
111.What is the proper sequence of adrenal cortex zones, from the outside in?
(a) Zona glomerulosa, zona fasciculata, zona reticularis
(b) Zona glomerulosa, zona reticularis, zona fasciculata
(c) Zona reticularis, zona fasciculata, zona glomerulosa
(d) Zona fasciculata, zona reticularis, zona glomerulosa
112.Which one of the following hormones is a modified amino acid?
(a) Epinephrine
(b) Progesterone
(c) Prostaglandin
(d) Oestrogen
113.Feeling the tremors of an earthquake a scared resident of seventh floor of a multistoryed building starts climbing down the stairs rapidly.’ “Which hormone initiated this action?
(a) Thyroxin
(b) Adrenaline
(c) Glucagone
(d) Gastrin
114.Hormone melatonin is secreted by
(a) adrenal
(b) thymus
(c) pituitary
(d) pineal
115.Which one of the following glands is correctly matched with the accompanying description?
116.The hormone that controls the level of calcium and phosphorus in the blood is secreted from
(a) thyroid
(b) parathyroid
(c) pituitary
(d) thymus
117.Both the ovaries are removed from a female rat. The hormone titre decreases in case of
(a) oxytocin
(b) prolactin
(c) oestrogen
(d)gonadotropin releasing factor
118.gonadotropin releasing factor Compared to a bull a bullock is docile because of
(a) higher levels of thyroxin
(b) higher levels of cortisone
(c) lower levels of blood testosterone
(d) lower levels of adrenalin/nor adrenalin in its blood
119. Luteinising Hormone (LH) in female
(a) helps in the appearance of secondary sexual characters
(b) stimulates ovary to secretes oestradiol
(c) helps in release of the ovum from the ovary
(d) control the blood pressure
120. Relaxin is secreted by
(a) corpus luteum
(b) pituitary
(c) pineal
(d) ovary
121. Testosterone is secreted by
(a) Leydig’s cells
(b) Sertoli cells
(c) Spermatogonia
(d) Both (a) and (b)
122. Withdrawal of which of the following hormones is the immediate cause of menstruation?
(a) Oestrogens
(b) FSH
(c) FSH-RH
(d) Progesterone
123. Corpus luteum produces
(a) progesterone
(b) cortisol
(c) oestradiol
(d) testosterone
124. Through negative feedback, a hormone may shut off the secretion of an anterior pituitary hormone by
(a) stimulating the release of a (hypothalamic) releasing hormone ,
(b) inhibiting the release of a v>.,pothalarnic) inhibiting hormone
(c) inhibiting the release of a (hypothalamic) releasing hormone
(d) All of the preceding
125. Which one of the following is not a second messenger in hormone action?
(a) c-GMP
(b) Calcium
(c) Sodium
(d) c-AMP
126. In hormone action, if receptor molecules are removed from target organ the target organ will
(a) continue to respond to hormone
(b) not respond to hormone
(c) continue to respond but requires higher concentration
(d) continue to respond but in the opposite way
127. Sympathetic nerves in mammals developes from
(a) sacral region
(b) cervical region
(c) thoracic-lumbar region
(d) 3rd, 7th, 9th and 10th cranial nerves
128. In a man, abducens nerve is injured. Which one of the following functions will be affected?
(a) Movement of the eye ball
(b) Swallowing
(c) Movement of the tongue
(d) Movement of the neck
129. Which of the following hormones is not a secretion product of human placenta?
(a) Human chorionic gonadotropin f
(b) Prolactin
(c) Oestrogen
(d) Progesterone
130. Organ, of Corti is the sensing structure formed at the junction of
(a) two nerves
(b) two bones
(c) nerve and muscle
(d) muscle and tendon
131. Venom of cobra affects
(a) respiratory system
(b) nervous system
(c) circulatory system
(d) digestive system
132. A common scent producing gland among mammals is
(a) anal gland
(b) prostate gland
(c) adrenal gland
(d) Bartholin’s gland
133. Glucagon produced by a-cells of islets of Langerhans
(a) converts glucose to glycogen
(b) converts glycogenjo glucose
(c) decreases concentration of glucose in blood
(d) None of the above
134. In fishes, the lateral line receptors are neuromast organs. These are
(a) olfactoreceptor
(b) gustatoreceptors
(c) rheoreceptors
(d) chemoreceptors
135. End bulbs of Krause, perceive the sensation of
(a) touch
(b) heat
(c) cold
(d) pressure
136. Sense of smell is perceived by 144. Assertion Our body secretes adrenaline in intense
(a) pituitary
(b) hypothalamus cold.
(c) olfactory lobe
(d) cerebrum Reason Adrenaline raises metabolic rate.
137. Given below is a table cdfnparing the effects of 145. Assertion Diabetes insipidus is marked by sympathetic and parasympathetic nervous system for excessive urination and too much thirst of water,
four features (a-d). Which one feature is correctly Reason Anti-Diuretic Hormone (ADH) is secreted by
described?
138. Which portion of the cochlea responds to low-frequency sound waves?
(a) The portion closest to the vestibular window
(b) The middle portion
(c) The portion closest to the cochlear nerve
(d) The end portion
139. Arbor vitae is composed of
(a) grey matter
(b) white matter
(c) neuroglia cells
(d) All of these
140. Which of the following is not a hereditary disease?
(a) Cretinism
(b) Cystic fibrosis
(c) Thalassaemia
(d) Haemophilia
Direction (Q. NOS. 141-146) In each of the following questions a statement of Assertion is given followed by a corresponding statement of Reason just below it. Of the statements, mark the correct answer as
(a) If both Assertion and Reason are true and Reason is the correct explanation of Assertion.
(b) If both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
(c) If Assertion is true, but Reason is false.
(d) If both Assertion and Reason are false.
141. Assertion The name ‘master endocrine gland of body’ is given to the pituitary gland.
Reason Hypothalamus controls over the master gland.
142. Assertion The imbalance in concentration of Na+, K+ and proteins generates resting potential.
Reason To maintain the unequal distribution of Na+ ‘ , and K+, the neurons use electrical energy.
143.Assertion Hypoglycemia disorder is due to imbalance of glucagon and insulin hormone.
Reason In hypoglycemia, the level of insulin is decreased and glucagon is increased.
144. Assertion Our body secretes adrenaline in intense
Reason Adrenaline raises metabolic rate.
145. Assertion Diabetes insipidus is marked by sympathetic and parasympathetic nervous system for excessive urination and too much thirst of water,
Reason Anti-Diuretic Hormone (ADH) is secreted by the posterior lobe of pituitary gland.
146. Assertion In hyperglycemia, the blood glucose level increases
Reason Insulin secretion is elevated above the normal range
147. Match the following columns.
Codes
A B C D
(a) 1 2 3 4
(b) 5 2 3 1
(c) 4 1 23
(d) 1 5.2 3
148. Match the following columns.
Codes
A B C D
(a) 5 1 2 3
(b) 1 2 3 4
(c) 4 5 2 1
(d) 2 3 4 5
149. Column I lists some disorders associated with brain and Column II lists the causes for these disorders. Match these two columns and identify the correct option from those given.
Codes
A B C D
(a) 5 4 3 1
(b) 2 3 1 4
(c) 2 3 4 1
(d) 2 4 3 1
150. Match the following columns
Codes
A B C D
(a) 4 2 1 5
(b) 5 2 3 4
(c) 4 3 1 5
(d) 23 1 5
151.Match the following columns
Codes
ABCD ABC
(a) 5 4 2 1 (b) 4 5 2
(c) 5 4 1 2 (d) 4 5 1
152. Match the following columns.
Codes
ABCD ABCD
(a) 5 3 4 2 (b) 5 3 1 4
(c) 1 2 4 3 (d) 3 5 4 2
153. From the statements given below, choose the correct ones regarding mode of action of water soluble hormones.
I. Require extracelluar receptors.
II. Hormones bind to membrane receptors.
III. Generation of sqcpndary messenger.
IV. Enter the cell and nuclei.
V. Synthesis new enzymes.
(a) I and II
(b) I, II and III
(c) III, IV and I
(d) IV, V and III
154. Which one of the following hormones though synthesised eleswhere, is stored and released by the master gland?
(a) Antidiuretic hormone
(b) Luteinizing hormone
(c) Prolactin
(d) Melanocyte stimulating hormone
155. Which one of the following hormones is not involved in sugar metabolism?
(a) Cortisone
(b) Aldosterone
(c) Insulin
(d) Glucagon
156. Destruction of the anterior horn cells of the spinal cord would result in loss of
(a) sensory impluses
(b) voluntary motor implulses
(c) commissural impulses
(d) integrating implulses
157. A chemical signal that has both endocrine and neural roles is
(a) melatonin
(b) calcitonin
(c) epinephrine
(d) cortisol
158. Which of the following regions of the brain is incorrectly paired with its function
(a) Medulla’oblongata- Homeostatic control
(b) Cerebellum-Language comprehension
(c) Corpus callosum-Communication between the left and right cerebral cortices
(d) Cerebrum-Calculation and contemplation
159. Stimulation of a muscle fibre by a motor neuron occurs at
(a) the neuromuscular junction
(b) the transverse tubules
(c) the myofibril
(d) the sarcoplasmic reticulum
160. Which one of the following statement is not correct?
(a) Retinol is the light absorbing portion of visual photopigments
(b) In retina the rods have the photopigment rhodopsin
(c) Retinol is a derivative of vitamin-C
(d) Rhodopsin is the purplish- red protein present in rods only
161. Injury localised to the hypothalamus would most likely disrupt.
(a) Short term ‘Memory’
(b) Coordination during locomotion
(c) Executive function, such as decision making
(d) Regulation of body temperature
162. Identify the hormone with’its correct matching of source and function.
163. Fight or flight reactions cause activation of
(a) the parathyroid glands, leading to increased metabolic rate
(b) the kidney, leading to suppression of renin angiotensin aldosterone pathway
(c) the adrenal medulla, leading to increased secretion of epinephrine and nor-epinephrine
(d) the pancreas leading to a reduction in the blood sugar levels
164. A diagram showing axon terminal and synapse is given. Identify correctly at least two of A-D.
(a) B-Synaptic connection, D-K+
(b) A-Neurotransmitter, B-Synaptic cleft
(c) C-Neurotransmitter, D-Ca2+
(d) A-Receptor, C-Synaptic vesicles
165. Which of the following statements is correct in relation to the endocrine system?
(a) Organs in the body like gastrointestinal tract, heart kidney and liver do not produce any hormones.
(b) Non-Nutrient chemicals produced by the body in trace amount that act as intercellular messenger are known as hormones.
(c) Releasing and inhibitory hormones are produced by the pituitary gland.
(d) Adenohypophysis is under direct neural regulation of the hypothalamus.
166. A pregnant female delivers a baby who suffers from stunted growth, mental retardation/low intelligence quotient and abnormal skin. This is the result of
(a) Low secretion of growth hormone
(b) Cancer of the thyroid gland
(c) Over secretion of pars distalis
(d) Deficiency of iodine in diet
167. WhiGh one of the following is not the function of placenta?
(a) Secretes oestrogen
(b) Facilitates removal of carbon dioxide and waste material from embryo.
(c) Secretes oxytocin during parturition
(d) Facilitates supply of oxygen and nutrients to embryo
168. Select the answer which correctly matches the endocrine gland with the hormone it secretes and its function/deficiency symptom.
(a) Anterior pituitary Oxytocin Stimulates uterus contraction during child birth
(b) Posterior pituitary Growth Hormone (GH) Over secretion stimulates abnormal growth
(c) Thyroid gland Thyroxine Lack of iodine in diet results in goitre
(d) Corpus luteum Testosterone Stimulates spermatogenesis
169. Parts A, B, C and D of the human eyes are shown in the diagram. Select the option, which gives correct identification along with its functions/characteristics.
(a) A-retina; contains photoreceptors-rods and cones
(b) B-blind spot; has only a few rods and cones
(c) C-aqueous chamber; reflects the light, which does not . pass through the lens
(d) D-choroid its anterior part forms ciliary body
170. The human hindbrain comprises three parts, one of which is
(a) spinal cord
(b) corpus callosum
(c) cerebellum
(d) hypothalamus
171. A person entering an empty room suddenly finds a snake right in front, on opening the door. Which one of the following is likely to happen in his neurohormonal control’system?
(a) Sympathetic nervous system is activated releasing epinephrine and norepinephrine from adrenal medulla
(b) Neurotransmitters diffuse rapidly across the cleft and transmit a nerve impulse
(c) Hypothalamus activates the parasympathetic division of brain
(d) Sympathetic nervous system is activated releasing epinephrine and norepinephrine from adrenal cortex
172. The Leydig cells as found in the human body are the secretory source of
(a) progesterone
(b) intestinal mucus
(c) glucagon
(d) androgens
173. Which one of the following pairs of hormones are the examples of those that can easily pass through the cell membrane of the target cell and bind to a receptor inside it (mostly in the nucleus)?
(a) Insulin and glucagon
(b) Thyroxine and insulin
(c) Somatostatin and oxytocin
(d) Cortisol and testosterone
174. What is correct to say about the hormone action in humans?
(a) Glucagon is secreted by (3-cells of islets of Langerhans and stimulates glycogenolysis
(b) Secretion of thymosin is stimulated with ageing
(c) In females, FSH first binds with specific receptors on ovarian cell membrane
(d) FSH stimulates the secretion of oestrogen and progesterone
175. In human adult females, oxytocin
(a) is secreted by anterior pituitary
(b) stimulates growth of mammary glands
(c) stimulates pituitary to secrete vasopressin
(d) causes strong uterine contraction during parturition
176. Which part of the human ear plays no role in hearing as such, but is otherwise very much required?
(a) Eustachian tube
(b) Organ of Corti
(c) Vestibular apparatus
(d) Ear ossicles
177. The purplish-red pigment rhodopsin contained in the rods type of photoreceptor cells of the human eyes is a derivative of
(a) Vitamin-C
(b) Vitamin-D
(c) Vitamin-A
(d) Vitamin-B
178. When a neuron is in resting state, i.e. not conducting any impulse, the axonal membrane is
(a) equally permeable to both Na+ and K+ ions
(b) impermeable to both Na+ and K+ ions-
(c) comparatively more permeable to K+ ions and nearly impermeable to Na+ ions
(d) comparatively more permeable to Na+ ions and nearly impermeable to K+ ions
179. Match the source gland with its respective hormone as well as the function.
180. Given ahead is an incomplete table about certain hormones, their source glands and one major effect of each on the body in humans. Identify the correct option for the three
181. Injury to adrenal cortex is not likely to affect the secretion of which one of the following?
(a) Aldosterone
(b) Both androstenedione and dehydroepiandrosterone
(c) Adrenaline
(d) Cortisol
182. Which one of the following pairs is incorrectly matched?
(a)Glucagon – Beta cells (source)
(b) Somatostain – Delta cells (source)
(c)Corpus luteum -Relaxin (secretion)
(d)InsulinDiabetes -mellitus (disease)
183. Toxic agents, present in food which interfere with thyroxine synthesis, lead to the development of
(a) toxic goitre
(b) cretinism ‘
(c) simple goitre
(d) thyrotoxicosis
184. Low Ca2+ in the body fluid may be the cause of
(a) tetany
(b) anaemia
(c) angina pectoris
(d) gout
Answers :
