MCQs*
Question: From NCERT NEET 2020
Match the following columns and select the correct option
Column - I Column - II
(a) The organ of Corti (i) Connects the middle ear and pharynx
(b) Cochlea (ii) Coiled part of the labyrinth
(c) Eustachian tube (iii) Attached to the oval window
(d) Stapes (iv)Located on the basilar membrane
(a) (b) (c) (d)
1. (iii) (i) (iv) (ii)
2. (iv) (ii) (i) (iii)
3. (i) (ii) (iv) (iii)
4. (ii) (iii) (i) (iv)
Answer ▽
2
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Question: From NCERT NEET 2020
Match the following columns and select the correct option :
Column - I Column - II
(a) Rods and cones (i) Absence of Cones photoreceptor cells
(b) Blind Spot (ii) Cones are densely packed
(c) Fovea (iii) Photoreceptor cells
(d) Iris (iv) Visible coloured portion of the eye
1. (a)-(iii), (b)-(i), (c)-(ii), (d)-(iv)
2. (a)-(ii), (b)-(iii), (c)-(i), (d)-(iv)
3. (a)-(iii), (b)-(iv), (c)-(ii), (d)-(i)
4. (a)-(ii), (b)-(iv), (c)-(iii), (d)-(i)
Answer ▽
1
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Question: From NCERT NEET 2019
Which part of the brain is responsible for thermoregulation?
1. Medulla oblongata
2. Cerebrum
3. Hypothalamus
4. Corpus callosum
Answer ▽
3
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Question: From NCERT NEET 2019
Which of the following statements is not correct?
1. An action potential in an axon does not move backward because the segment behind is in a refractory phase.
2. Depolarization of hair cells of cochlea results in the opening of the mechanically gated Potassium- ion channels.
3. Rods are very sensitive and contribute to daylight vision.
4. In the knee-jerk reflex, stimulus is the stretching of muscle and response is its contraction.
Answer ▽
3
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Question: From NCERT NEET 2019
Which of the following receptors are specifically responsible for maintenance of balance of body and posture ?
1. Basilar membrane and otoliths
2. Hair cells and organ of corti
3. Tectorial membrane and macula
4. Crista ampullaris and macula
Answer ▽
4
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Question: From NCERT NEET 2018
2. Limbic system: consists of fibre tracts that interconnect different regions of brain; controls movement.
3. Hypothalamus: production of releasing hormones and regulation of temperature, hunger and Thirst.
4. Corpus callosum: band of fibers connecting left and right cerebral hemispheres.
Answer ▽
2
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Question: From NCERT NEET 2018
2. ligaments attached to the iris
3. smooth muscles attached to the iris
4. smooth muscles attached to the ciliary body
Answer ▽
1
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Question: From NCERT NEET 2016
Photosensitive compound in human eye is made up of
1. opsin and Retinal
2. opsin and Retinol
3. transducin and Retinene
4. guanosine and Retinol
Answer ▽
1
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Question: From NCERT NEET 2015
2. vestibular apparatus
3. tectorial membrane
4. organ of Corti
Answer ▽
2
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Question: From NCERT NEET 2014
Injury localized to the hypothalamus would most likely disrupt
1. short-term memory
2. co-ordination during locomotion
3. executive functions, such as decision making
4. regulation of body temperature
Answer ▽
1
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Question: From NCERT NEET 2013
A diagram showing axon terminal and synapse is given. Identify correctly at least two of A-C.
Answer ▽
A
Correct Option: A
Explanation:
- An axon terminal contains various neurotransmitters that are released at the small gap between two communicating neurons. This gap is called a synapse. The neuron that sends nerve impulses by releasing neurotransmitters via the axon terminal at the synapse is called a presynaptic neuron.
- The synaptic vesicles (represented by C) are present inside the axon terminals and they contain the neurotransmitters. They get attached to the pre-synaptic membrane and release the neurotransmitter in the synaptic cleft (represented by B) which gets attached to the receptor (represented by A) present on post-synaptic membrane.
Thus, the correct solution is option A.
- An axon terminal contains various neurotransmitters that are released at the small gap between two communicating neurons. This gap is called a synapse. The neuron that sends nerve impulses by releasing neurotransmitters via the axon terminal at the synapse is called a presynaptic neuron.
- The synaptic vesicles (represented by C) are present inside the axon terminals and they contain the neurotransmitters. They get attached to the pre-synaptic membrane and release the neurotransmitter in the synaptic cleft (represented by B) which gets attached to the receptor (represented by A) present on post-synaptic membrane.
Thus, the correct solution is option A.
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Question: From NCERT NEET 2013
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
1. A-retina-contains photoreceptors-rods and cones
2. B-blind spot-has only a few rods and cones
3. C-aqueous chamber-reflects the light which does not pass through the lens
4. D-choroidits anterior part forms ciliary body
Answer ▽
1
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Question: From NCERT NEET 2012
Which part of the human ear plays no role in hearing as such but is otherwise very much
required?
1. Eustachian tube
2. Organ of Corti
3. Vestibular apparatus
4. Ear ossicles
Answer ▽
3
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Question: From NCERT NEET 2012
The human hind brain comprises three parts, one of which is
1. Cerebellum
2. Hypothalamus
3. Spinal
4. Corpus callosum
Answer ▽
1
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Question: From NCERT NEET -201--1
When a neuron is an resting state, ie, not conducting any impulse, the axonal membrane
is
1. equally permeable to both Na+ and K+ ions
2. impermeable to both Na+ and K+ ions
3. comparatively more permeable to K+ ions and nearly impermeable to Na+ ions
4. comparatively more permeable to Na+ ions and nearly impermeable to K+ ions
Answer ▽
3
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Question: From NCERT NEET 2008
Given below is a diagrammatic cross section of a single loop of human cochlea.
Which one of the following options correctly. represents the names of three different
parts?
1. B : Tectorial membrane
C: Perilymph
D : Secretory cells
2. C: Endolymph
D : Sensory hair celis
A: Serum
3. D: Sensory hair cells
A: Endolymph
B: Tectorial membrane
4. A : Perilymph
B: Tectorial membrane
C: Endolymph
Answer ▽
4
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Question: From NCERT NEET 2008
During the propagation of a nerve impulse, the action potential results from the movement of
1. K+ ions from extracelular 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
Answer ▽
4
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Question: From NCERT NEET 2007
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 ?
1. First negative, then positive and again back to negative
2. First positive, then negative and continue to be negative
3. First negative, then positive and continue to be positive
4. First positive, them negative and again back to positive
Answer ▽
1
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Question: From NCERT AIIMS - 2015
Node of Ranvier occurs where
(1) nerve is covered with myelin sheath
(2) neurolemma is discontinuous
(3) neurolemma and myelin sheath are discontinuous
(4) myelin sheath is discontinuous
Answer ▽
4
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Question: From NCERT AIIMS - 2014
Given is the diagrammatic representation of the sectional view of cochlea. Select the correct option regarding it.
(a) A - Organ of corti-responsible for maintenance of balance of the body and posture.
(b) B - Scala vestibuli-filled with endolymph that ends at the round window.
(c) C - Scala tympani- terminates at the round window which opens to the middle ear.
(d) D - Basilar membrane nerve impulses are generated against it.
Answer ▽
3
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Question: From NCERT AIIMS - 2012
Which of the following is correctly labelled?
(1) A: Reissner's membrane
(2) B:Scala vestibuli
(3) C: Basilar membrane
(4) D: Tectorial membrane
Answer ▽
4
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Question: From NCERT Derived PYQ
Answer ▽
2
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Question: From NCERT Derived PYQ
The brain stem does not include :
1. Mid brain
2. Medulla oblongata
3. Pons varolii
4. Cerebellum
Answer ▽
4
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Question: From NCERT Derived PYQ
Which of the following is a major coordinating center for sensory and motor signaling for the cerebrum?
1. Hypothalamus
2. Thalamus
3. Corpora quadrigemina
4. Amygdala
Answer ▽
2
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Question: From NCERT Derived PYQ
The sensory neuron enters the spinal cord through:
1. The dorsal root of the spinal nerve
2. The ventral root of the spinal nerve
3. Either dorsal or ventral root depending on the point of origin
4. Both dorsal and ventral roots of the spinal nerves
Answer ▽
1
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Question: From NCERT Derived PYQ
From inside to outside the correct order of the following cells in the retina would be:
1. Ganglion cells - Photoreceptor cells - Bipolar cells
2. Ganglion cells - Bipolar cells - Photoreceptor cells
3. Bipolar cells - Photoreceptor cells - Ganglion cells
4. Photoreceptor cells - Ganglion cells - Bipolar cells
Answer ▽
2
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Question: From NCERT Derived PYQ
Reissner's membrane separates
1. Scala vestibuli and Scala media
2. Tympanic cavity and Pharynx
3. Fenestra rotundus and Fenestra ovalis
4. Scala media and Scala tympani
Answer ▽
1
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Question: From NCERT Derived PYQ
The depolarization of the axonal membrane is due to:
1. Influx of sodium ions
2. Efflux of sodium ions
3. Influx of potassium ions
4. Efflux of the potassium ions
Answer ▽
1
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Question: From NCERT Derived PYQ
Immediately after an action potential has peaked, which cellular gates open?
1. Sodium
2. Chloride
3. Calcium
4. Potassium
Answer ▽
4
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Question: From NCERT Derived PYQ
The stapes sends its vibrations to
1. Incus
2. Round window
3. Tympanic membrane
4. Oval window
Answer ▽
4
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Question: From NCERT Derived PYQ
Above the rows of hair cells of Organ of Corti, there is a thin elastic membrane called:
1. Reissner's membrane
2. Basilar membrane
3. Tectorial membrane
4. Tympanic membrane
Answer ▽
3
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Question: From NCERT Derived PYQ
Consider the following statements:
I. The resting axonal membrane is nearly impermeable to sodium ions.
II. Depolarization of the axonal membrane is due to influx of sodium ions.
III. The size of the action potential, if produced, does not depend on the strength of the stimulus.
Which of the above statements are true?
1. I and II only
2. I and III only
3. II and III only
4. I, II and III
Answer ▽
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Question: From NCERT Derived PYQ
Unipolar neurons are found only in
1. early embryos
2. olfactory epithelium
3. retina of the eye
4. spinal cord
Answer ▽
1
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Question: From NCERT Derived PYQ
Which of the following minerals reduces the excitability of nerves and muscles ?
1. Potassium
2. Sodium
3. Magnesium
4. Manganese
Answer ▽
1
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Question: From NCERT Derived PYQ
Which of the following does not has brain?
(1) Hydra
(2) Insects
(3) Vertebrates
(4) Earthworm
Answer ▽
1
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Question: From NCERT Derived PYQ
Visceral nervous system is
(1) A part of PNS
(2) Made up of nerves, Fibres, Ganglia and Plexuses
(3) Transmit information from CNS to the viscera and viscera to CNS
(4) All of these
Answer ▽
4
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Question: From NCERT Derived PYQ
Nissl's Granules are not found in
(1) Dendrites
(2) Cell body
(3) Axon
(4) Both A and C
Answer ▽
3
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Question: From NCERT Derived PYQ
Which of the following is found usually in the embryonic stage?
(1) Unipolar
(2) Bipolar
(3) Multipolar
(4) Both B and C
Answer ▽
1
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Question: From NCERT Derived PYQ
Unmyelinated nerve fibres are found in
(1) Autonomous
(2) Somatic Neural systems
(3) Both A and B
(4) CNS
Answer ▽
3
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Question: From NCERT Derived PYQ
When neuron is resting, which of the following is false with respect to that
(1) It is not conducting any impulse
(2) Axonal membrane is more permeable to potassium ions
(3) Axonal membrane won't allow any flow of sodium ions across it
(4) Membrane is impermeable to negatively charged proteins
Answer ▽
3
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Question: From NCERT Derived PYQ
The………. Difference across the resting membrane is called as Resting potential.
(1) Electrochemical potential
(2) Elecrical potential
(3) Chemical
(4) Chemiosmotic
Answer ▽
2
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Question: From NCERT Derived PYQ
When a stimulus is applied at a site over neuron membrane
(1) It becomes freely permeable to Sodium ions
(2) It becomes freely permeable to potassium ions
(3) It causes reversal of polarity from positive to negative on inner side
(4) Both A and C
Answer ▽
1
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Question: From NCERT Derived PYQ
In a neuron if stimulus is given at point A then in which direction current flows?
(1) From site A to site B on innerside
(2) From site A to site B on outerside
(3) From site B to site A on outerside
(4) Both A and C
Answer ▽
4
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Question: From NCERT Derived PYQ
Nerve impulse is transmitted from one neuron to another neuron by the means of
(1) Synapse
(2) Junction
(3) Both A and B
(4) Current only
Answer ▽
3
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Question: From NCERT Derived PYQ
Which of the following has not to be there in a synapse?
(1) Pre synaptic neuron
(2) Post synaptic neuron
(3) Synaptic cleft
(4) None of these
Answer ▽
3
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