NEET Topic-wise & A
Topic 1: NEURON AS STRUCTURAL & FUNCTIONAL UNIT OF NEURAL SYSTEM
NEET: Previous Years Questions
01. Nissl bodies are mainly composed of
(1) Protein and lipids
(2) DNA and RNA
(3) Nucleic acids and SER
(4) Free ribosomes and RER (NEET 2018)
✅ (4) Free ribosomes and RER
02. Myelin sheath is produced by
(1) astrocytes and Schwann cells
(2) oligodendrocytes and osteoclasts
(3) osteoclasts and astrocytes
(4) Schwann cells and oligodendrocytes (NEET 2017)
✅ (4) Schwann cells and oligodendrocytes
03. Receptor sites for neurotransmitters are present on
(1) pre-synaptic membrane
(2) tips of axons
(3) post-synaptic membrane
(4) membranes of synaptic vesicles (NEET 2017)
✅ (3) post-synaptic membrane
Model Questions
04. Following are some statements related to neurons. Select the false statement.
(1) The cell body and dendrites contain certain granular bodies called Nissl’s granules.
(2) Dendrites transmit impulses towards the cell body.
(3) Schwan cells are seen only in myelinated neuron.
(4) Myelinated nerve fibres are found in spinal and cranial nerves.
✅ (3) Schwan cells are seen only in myelinated neuron.
05. Label A, B, C, D and E in the following figure.
(1) A= Nissl’s granules, B= Schwan cell, C= Myelin sheath, D= Node of Ranvier, E= Synaptic knob
(2) A= Nissl’s granules, B= Myelin sheath, C= Schwan cell, D= Node of Ranvier, E= Synaptic knob
(3) A= Nissl’s granules, B= Schwan cell, C= Myelin sheath, D= Synaptic knob, E= Node of Ranvier
(4) A= Nissl’s granules, B= Myelin sheath, C= Schwan cell, D= Synaptic knob, E= Node of Ranvier
✅ (1) A= Nissl’s granules, B= Schwan cell, C= Myelin sheath, D= Node of Ranvier, E= Synaptic knob
06. Gaps between two adjacent myelin sheaths is called
(1) Synaptic knob
(2) Synaptic cleft
(3) Nodes of Ranvier
(4) Axon terminal
✅ (3) Nodes of Ranvier
07. Consider the following statements regarding unipolar neuron
a. It is found in embryo
b. It has only one axon and one dendron
c. A long axon is projected from cyton
(1) a & c are correct
(2) a & b are correct
(3) b & c are correct
(4) only a is correct
✅ (1) a & c are correct
08. Given below are the statements regarding resting neuron
a. The resting membrane potential is +30 mV
b. In resting membrane, outside is +vely charged and inside is –vely charged
c. Resting membrane has only a poor permeability for Na⁺ and has a higher permeability for K⁺
d. The ionic gradients are due to sodium-potassium pump which transports 2 Na⁺ outwards for 3 K⁺ into the cell
(1) a & c are correct
(2) a & b are correct
(3) b & c are correct
(4) a & d are correct
✅ (3) b & c are correct
09. During the propagation of a nerve impulse, the action potential results from the movement of
(1) K⁺ ions from extracellular fluid to intracellular fluid
(2) Na⁺ ions from intracellular fluid to extracellular fluid
(3) K⁺ ions from intracellular fluid to extracellular fluid
(4) Na⁺ ions from extracellular fluid to intracellular fluid
✅ (4) Na⁺ ions from extracellular fluid to intracellular fluid
10. Which statement is incorrect about synaptic transmission?
(1) Impulse transmission in electrical synapse is faster than in chemical synapse
(2) Electrical synapses are very rare in human system
(3) When the impulse reaches the presynaptic region, synaptic vesicles break and release neurotransmitters
(4) Based on neurotransmitter, electrical synapses are 2 types – Cholinergic & Adrenergic
✅ (4) Based on neurotransmitter, electrical synapses are 2 types – Cholinergic & Adrenergic
11. In the following diagram showing axon terminal and synapse A, B, C, D and E respectively represents
(1) A – axon terminal, B – synaptic cleft, C – synaptic vesicles, D – neurotransmitters, E – receptors
(2) A – axon terminal, B – synaptic vesicles, C – synaptic cleft, D – receptors, E – neurotransmitters
(3) A – synaptic cleft, B – synaptic vesicles C – axon terminal, D – neurotransmitters, E – receptors
(4) A – synaptic cleft, B – axon terminal, C – synaptic vesicles, D – neurotransmitters, E – receptors
✅ (2) A – axon terminal, B – synaptic vesicles, C – synaptic cleft, D – receptors, E – neurotransmitters
12. Receptor sites for neurotransmitters are present on
(1) Pre-synaptic membrane
(2) Tips of axons
(3) Post-synaptic membrane
(4) Membranes of synaptic vesicles
✅ (3) Post-synaptic membrane
13. Unidirectional transmission of a nerve impulse through nerve fibres is due to a fact that
(1) Nerve fibre is insulated by a medullary sheath.
(2) Sodium pump starts operating only at the cyton and then continues into the nerve fibre.
(3) Neurotransmitters are released by the dendrites and not by axon endings.
(4) Neurotransmitters are released by the axon endings and not by dendrites.
✅ (4) Neurotransmitters are released by the axon endings and not by dendrites.
Topic 2: HUMAN NEURAL SYSTEM, REFLEX ACTION
NEET: Previous Years Questions
14. Match List I with List II: (NEET 2024)
Choose the correct answer from the options given below:
(1) A-II, B-III, C-I, D-IV
(2) A-III, B-IV, C-II, D-I
(3) A-I, B-III, C-II, D-IV
(4) A-II, B-I, C-III, D-IV
✅ (2) A-III, B-IV, C-II, D-I
15. Given below are two statements:
Statement I: The cerebral hemispheres are connected by nerve tract known as corpus callosum.
Statement II: The brain stem consists of the medulla oblongata, pons and cerebrum.
In the light of the above statements, choose the most appropriate answer from the options given below:
(1) Both Statement I and Statement II are correct.
(2) Both Statement I and Statement II are incorrect.
(3) Statement I is correct but Statement II is incorrect.
(4) Statement I is incorrect but Statement II is correct. (NEET 2024)
✅ (3) Statement I is correct but Statement II is incorrect.
16. The parts of human brain that helps in regulation of sexual behaviour, expression of excitement, pleasure, rage, fear etc. are
(1) Corpora quadrigemina and hippocampus
(2) Brain stem and epithalamus
(3) Corpus callosum and thalamus
(4) Limbic system and hypothalamus (NEET 2023)
✅ (4) Limbic system and hypothalamus
17. Which part of the brain is responsible for thermoregulation? (NEET 2019)
(1) Cerebrum
(2) Hypothalamus
(3) Corpus callosum
(4) Medulla oblongata
✅ (2) Hypothalamus
18. Which one of the following structures or regions is incorrectly paired with its function? (NEET 2018)
(1) Medulla oblongata - Controls respiration and cardiovascular reflexes
(2) Limbic system - Consists of fibre tracts that interconnect different region of brain; control movement
(3) Hypothalamus - Production of releasing hormones and regulation of temperature, hunger and thirst
(4) Corpus callosum - Bands of fibres connecting left and right cerebral hemisphere
✅ (2) Limbic system - Consists of fibre tracts that interconnect different region of brain; control movement
Model Questions
19. Correct sequence of meninges from inner to outer is
(1) Dura mater → pia mater → arachnoid membrane
(2) Dura mater → arachnoid membrane → pia mater
(3) Arachnoid membrane → dura mater → pia mater
(4) Pia mater → arachnoid membrane → dura mater
✅ (4) Pia mater → arachnoid membrane → dura mater
20. Cerebrum controls
(1) Sneezing, coughing, speech, vision
(2) Vision, speech, intelligence, hearing, taste
(3) Intelligence, memory, body balance, coughing
(4) Memory, thinking, body balance, sneezing
✅ (2) Vision, speech, intelligence, hearing, taste
21. The decoding and interpretation of visual information is carried out by which part of the cerebrum?
(1) Frontal lobe
(2) Parietal lobe
(3) Temporal lobe
(4) Occipital lobe
✅ (4) Occipital lobe
22. The inner parts of cerebral hemispheres and a group of associated deep structures like amygdala, hippocampus, hypothalamus, etc. together constitute
(1) Limbic system
(2) Wernicke’s area
(3) Corpora quadrigemina
(4) Brain stem
✅ (1) Limbic system
23. Hippocampus is
(1) Name of a fish
(2) A part of brain
(3) Name of a mammal
(4) Both A & B
✅ (4) Both A & B
24. A man is admitted to a hospital. He is suffering from an abnormally low body temperature, loss of appetite and extreme thirst. His brain scan would probably show a tumor in
(1) Medulla oblongata
(2) Pons
(3) Cerebellum
(4) Hypothalamus
✅ (4) Hypothalamus
25. Thalamus is also known as
(1) Relay station
(2) Gate keeper
(3) Biological clock
(4) Both A & B
✅ (4) Both A & B
26. Electric potential of brain is recorded by
(1) ERG
(2) EMG
(3) EEG
(4) ECG
✅ (3) EEG
27. Analyze the statements given below regarding the cerebellum (‘little cerebrum’) and select the true statements.
a. It is the largest part of hindbrain
b. It has 2 hemispheres
c. It is the centre of short-term memory
d. It has outer gray matter and inner white matter
e. It synchronizes the activity of voluntary muscles
(1) a, b, d, & e are correct
(2) Only e is correct
(3) d & e are correct
(4) c & d are correct
✅ (1) a, b, d, & e are correct
28. The tract of nerve fibres which connects the cerebral hemispheres is
(1) Corpus luteum
(2) Corpus callosum
(3) Corpora quadrigemina
(4) Cerebral aqueduct
✅ (2) Corpus callosum
29. The mixed nerves of cranial origin are
(1) 1,2,8
(2) 5,7,9,10
(3) 3,4,6,11,12
(4) All are mixed nerves
✅ (2) 5,7,9,10
30. Sympathetic system and adrenaline
(1) Are the part of ANS
(2) Prepare body to cope with emergencies & stresses
(3) Are antagonistic in action
(4) Dilate arteries and lower BP
✅ (2) Prepare body to cope with emergencies & stresses
31. Assertion (A): Sympathetic and parasympathetic nervous systems are antagonistic to each other.
Reason (R): Parasympathetic nervous system prepares the body for action, while the sympathetic system calms down the body after action.
(1) Both A and R are correct and R is the correct explanation for A.
(2) Both A and R are correct but R is not the correct explanation for A.
(3) A is correct but R is not correct.
(4) Both A and R are not correct.
✅ (3) A is correct but R is not correct.
32. 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 neuro-hormonal control system?
(1) Sympathetic nervous system is activated releasing epinephrine & norepinephrine from adrenal medulla.
(2) Neurotransmitters diffuse rapidly across the cleft and transmit a nerve impulse.
(3) Hypothalamus activates the parasympathetic division of the brain.
(4) Sympathetic nervous system is activated releasing adrenaline & noradrenaline from adrenal cortex.
✅ (1) Sympathetic nervous system is activated releasing epinephrine & norepinephrine from adrenal medulla.
33. Route of reflex arc is
(1) Receptors, effectors, grey matter and motor fibres
(2) Sensory fibres, grey matter, motor fibres, receptors and effectors
(3) Receptors, sensory fibres, grey matter, motor fibres and effectors
(4) Effectors, grey matter, motor, sensory fibres and receptors
✅ (3) Receptors, sensory fibres, grey matter, motor fibres and effectors
34. Knee jerk phenomenon and milk sucking of a nursing baby are examples for
(1) Reflex action
(2) Rapid and involuntary action
(3) Unconditioned, involuntary & unconscious action
(4) The entire above
✅ (4) The entire above
Topic 3: SENSE ORGANS
NEET: Previous Years Questions
35. Match List I with List II with respect in human eye.
Choose the correct answer from the options given below:
(1) A-IV, B-III, C-II, D-I
(2) A-I, B-IV, C-III, D-II
(3) A-II, B-I, C-III, D-IV
(4) A-III, B-I, C-IV, D-II (NEET 2023)
✅ (4) A-III, B-I, C-IV, D-II
36. Match the following columns and select the correct option. (NEET 2020)
✅ (1) (iv) (ii) (i) (iii)
37. Which of the following statements is correct?
(1) Cornea is an external, transparent and protective proteinaceous covering of the eye-ball.
(2) Cornea consists of dense connective tissue of elastin and can repair itself.
(3) Cornea is convex, transparent layer which is highly vascularized.
(4) Cornea consists of dense matrix of collagen and is the most sensitive portion of the eye. (NEET 2019)
✅ (4) Cornea consists of dense matrix of collagen and is the most sensitive portion of the eye.
38. The transparent lens in the human eye is held in its place by
(1) Ligaments attached to the ciliary body
(2) Ligaments attached to the iris
(3) Smooth muscle attached to the iris
(4) Smooth muscles attached to the ciliary body (NEET 2018)
✅ (1) Ligaments attached to the ciliary body
39. Good vision depends on adequate intake of carotene rich food. Select the best option from the following statements.
1. Vitamin A derivatives are formed from carotene.
2. The photopigments are embedded in the membrane discs of the inner segment.
3. Retinal is a derivative of vitamin A.
4. Retinal is a light absorbing part of all the visual photopigments.
(1) 1, 3 and 4
(2) 1 and 3
(3) 2, 3 and 4
(4) 1 and 2 (NEET 2017)
✅ (1) 1, 3 and 4
40. Choose the correct statement.
(1) Nociceptors respond to changes in pressure.
(2) Meissner’s corpuscles are thermoreceptors.
(3) Photoreceptors in the human eye are depolarised during darkness and become hyperpolarised in response to the light stimulus.
(4) Receptors do not produce graded potentials. (NEET-II 2016)
✅ (3) Photoreceptors in the human eye are depolarised during darkness and become hyperpolarised in response to the light stimulus.
41. Photosensitive compound in human eye is made up of
(1) opsin and retinol
(2) transducin and retinene
(3) guanosine and retinol
(4) opsin and retinal (NEET-I 2016)
✅ (4) opsin and retinal
Model Questions
42. Transparent part of sclera is called
(1) Conjunctiva
(2) Cornea
(3) Pupil
(4) Iris
✅ (2) Cornea
43. The focal length of eye lens is controlled by
(1) Iris muscle
(2) Ciliary body
(3) Pupil
(4) Cornea
✅ (2) Ciliary body
44. Which is not correct about macula lutea?
(1) Its central pit is known as fovea centralis
(2) It is a transducer of RGB light
(3) Cones and rods are absent
(4) It is the area of keenest vision
✅ (3) Cones and rods are absent
45. Arrange the layers of cells in retina of human eye from inside to outside
(1) Ganglion cells → bipolar cells → photoreceptor cells
(2) Photoreceptor cells → ganglion cells → bipolar cells
(3) Ganglion cells → photoreceptor cells → bipolar cells
(4) Bipolar cells → photoreceptor cells → ganglion cells
✅ (1) Ganglion cells → bipolar cells → photoreceptor cells
46. Label a, b, c, d and e in the given figure.
(1) a– occipital bone, b– malleus, c– incus, d– stapes, e– cochlea
(2) a– parietal bone, b– stapes, c– incus, d– malleus, e– cochlear nerve
(3) a– temporal bone, b – malleus, c– incus, d– stapes, e– cochlear nerve
(4) a– frontal bone, b– incus, c– malleus, d– stapes, e– cochlea
✅ (3) a– temporal bone, b – malleus, c– incus, d– stapes, e– cochlear nerve
47. Select the correct sequence showing the steps of mechanism of hearing.
(1) Pinna – cochlea – tympanic membrane – auditory canal – malleus – stapes – incus – auditory nerve
(2) Pinna – tympanic membrane – auditory canal – incus – malleus – stapes – cochlea – auditory nerve
(3) Pinna – auditory canal – tympanic membrane – malleus – incus – stapes – cochlea – auditory nerve
(4) Pinna – malleus – incus – stapes – auditory canal – tympanic membrane – cochlea – auditory nerve
✅ (3) Pinna – auditory canal – tympanic membrane – malleus – incus – stapes – cochlea – auditory nerve
48. The Organ of Corti is located on
(1) Basilar membrane
(2) Tectorial membrane
(3) Reissner’s membrane
(4) Tympanic membrane
✅ (1) Basilar membrane
49. Which is concerned with equilibrium?
(1) Cerebellum
(2) Cristae
(3) Semicircular canal
(4) All of these
✅ (4) All of these
50. Select the part having double role?
(1) Hypothalamus
(2) Pancreas
(3) Ear
(4) All of these
✅ (4) All of these
51. Which of the following group is with unrelated parts?
(1) Reissner’s membrane, Tectorial membrane, basilar membrane
(2) Malleus, Incus, stapes
(3) Cones, rods, yellow spot
(4) Semi-circular canal, semi-lunar valve, seminal vesicle
✅ (4) Semi-circular canal, semi-lunar valve, seminal vesicle
52. Select the chemoreceptor organs.
(1) Nose & tongue
(2) Ear & skin
(3) Eye & ear
(4) Skin & nose
✅ (1) Nose & tongue
53. Which of the following is known as Gustatoreceptors?
(1) Ear
(2) Nose
(3) Tongue
(4) Skin
✅ (3) Tongue