NEET Biology Neural Control and Coordination MCQs Set 18

Practice MCQs for NEET Biology Neural Control and Coordination

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Multiple Choice Questions

Question 1: Which of the following is not the action of sympathetic nervous system?
(a) Slows down peristalsis
(b) Erection of hair
(c) Contraction in gall bladder
(d) Constrict arteries and raises blood pressure
Show Answer & Explanation

Answer: (c) Contraction in gall bladder

Explanation:
1. Contraction of gall bladder secretion of bile leading to the digestion of the lipid is a function of parasympathetic nervous system.

Question 2: Rate of conduction of impulse will be faster in case of
(a) Myelinated nerve fibre
(b) Thicker nerve fibre
(c) Non-myelinated nerve fibre
(d) Both (1) and (2)
Show Answer & Explanation

Answer: (d) Both (1) and (2)

Explanation:
1. In myelinated fibre, impulse travesl from node to node.
2. Rate of conduction of impulse is faster in case of myelinated and thicker neurons.

Question 3: If the ligament directly below the kneecap is struck lightly by the edge of the hand or by a doctor’s rubber hammer, knee jerk reflex occurs. This stretch reflex is
(a) Polysynaptic
(b) Withdrawl
(c) Monosynaptic
(d) Bisynaptic
Show Answer & Explanation

Answer: (c) Monosynaptic

Explanation:
1. Knee-jerk reflex is monosynaptic and does not involve interneurons, only single synapse is found.

Question 4: Which of the following is not a part of knee jerk reflex?
(a) Afferent pathway
(b) Muscle spindle
(c) Efferent pathway
(d) Interneuron
Show Answer & Explanation

Answer: (d) Interneuron

Explanation:
1. Knee jerk reflex is an example of monosynaptic reflex and does not involve interneuron.

Question 5: Pacinian corpuscles which occur in the skin are
(a) Free sensory nerve endings
(b) Specialised cells at the end of the sensory nerve fibre
(c) A type of gland
(d) Encapsulated pressure receptors deep in the dermis
Show Answer & Explanation

Answer: (d) Encapsulated pressure receptors deep in the dermis

Explanation:
1. Pacinian corpuscle : Encapsulated, pressure sensing receptor, present deep in the dermis.
2. Free sensory nerve endings : Pain.

Question 6: Which of the following is located in deeper parts of skin and is sensitive to pressure?
(a) Meissner's corpuscles
(b) Merkel’s disc
(c) Pacinian corpuscles
(d) Ruffini's corpuscles
Show Answer & Explanation

Answer: (c) Pacinian corpuscles

Explanation:
1. Pacinian corpuscle - pressure Meissner’s corpuscle Merkel's disc touch Ruffinis corpuscle - hot/heat.

Question 7: Highly vascular and closely inverting protective coat around brain is known as
(a) Arachnoid
(b) Piamater
(c) Duramater
(d) Sub-arachnoid space
Show Answer & Explanation

Answer: (b) Piamater

Explanation:
1. Piamater - Innermost, highly vascular Duramater - Outermost, fibrous Arachnoid - Middle, thin.

Question 8: Helicotrema connects
(a) Scala vestibuli and scala tympani filled with endolymph
(b) Scala vestibuli and scala media filled with perilymph
(c) Scala vestibuli and scala tympani filled with perilymph
(d) Scala media and scala tympani filled with endolymph
Show Answer & Explanation

Answer: (c) Scala vestibuli and scala tympani filled with perilymph

Explanation:
1. Helicotrema connects scala vestibuli to scala tympani filled with perilymph.

Question 9: Which of the following part in ear is filled with endolymph?
(a) Scala vestibuli
(b) Scala tympani
(c) Median canal
(d) Helicotrema
Show Answer & Explanation

Answer: (c) Median canal

Explanation:
1. Median canal (scala media) contains endolymph.

Question 10: The membrane that gives us the ability to discriminate different pitches of sound is the
(a) Round window
(b) Tympanic membrane
(c) Tectorial membrane
(d) Basilar membrane
Show Answer & Explanation

Answer: (d) Basilar membrane

Explanation:
1. The basilar membrane is responsible for identifying various pitches of sound.
2. The basilar membrane has different flexibility in the proximal (A) to distal (B) position, resulting in sensation of different pitches.

Question 11: Cornea transplant in humans is almost never rejected. This is because
(a) It is a no-living layer
(b) Its cells are least penetrable by bacteria
(c) It has no blood supply
(d) It is composed of enucleated cells
Show Answer & Explanation

Answer: (c) It has no blood supply

Explanation:
1. Cornea has no blood supply, so transplant is always successful.

Question 12: In the chemistry of vision in mammals, the photosensitive substance is called
(a) Rhodopsin
(b) Melanin
(c) Sclerotin
(d) Retinol
Show Answer & Explanation

Answer: (a) Rhodopsin

Explanation:
1. Rhodopsin is the photosensitive pigment in mammals.

Question 13: Which food should be eaten in case of deficiency of rhodopsin in eyes?
(a) Carrot and ripe papayas
(b) Guava, Banana
(c) Mango, Potato
(d) None of these
Show Answer & Explanation

Answer: (a) Carrot and ripe papayas

Explanation:
1. This option, Carrot and ripe papayas, is the correct choice, as it agrees with the standard NCERT account of this topic.

Question 14: When we migrate from dark to light, we fail to see for sometime but after a time, visibility becomes normal. It is example of
(a) Accommodation
(b) Adaptation
(c) Mutation
(d) Photoperiodism
Show Answer & Explanation

Answer: (b) Adaptation

Explanation:
1. This option, Adaptation, is the correct choice, as it agrees with the standard NCERT account of this topic.

Question 15: Which of the following keeps our body temperature at roughly 37°C by means of a complex thermostat system?
(a) Somatosensory area
(b) Hypothalamus
(c) Basal ganglia
(d) Cerebellum
Show Answer & Explanation

Answer: (b) Hypothalamus

Explanation:
1. Hypothalamus is responsible for maintaining thermostat of the body and keeps temperature of the body at 37ºC.

Question 16: Match the column I with column II Column-I Column-II<br />a. Horizontal and amacrine cell (i) Pivot point<br />b. Incus (ii) Olfactory epithelium<br />c. Bowman’s gland (iii) Retina<br />d. Cupula (iv) Crista<br />(v) Macula
(a) a(iv), b(v), c(ii), d(iii)
(b) a(i), b(ii), c(iii), d(iv)
(c) a(iii), b(i), c(ii), d(iv)
(d) a(iii), b(i), c(ii), d(v)
Show Answer & Explanation

Answer: (c) a(iii), b(i), c(ii), d(iv)

Explanation:
1. Horizontal and amacrine cells – retina Malleus–incus – Pivot joint Bowman's gland – Olfactory epithelium Cupula – Crista.

Question 17: Human eye is adjusted for distant objects more than 6 m away. For seeing the near objects which of the following would not occur?
(a) Contraction in circular ciliary muscle
(b) Slackening of suspensory ligaments
(c) Radius of curvature of lens decreases
(d) Decrease in curvature of the lens
Show Answer & Explanation

Answer: (d) Decrease in curvature of the lens

Explanation:
1. Lens For seeing the nearer objects Object Image (a) Curvature of lens increases (Near i.e, (6m) (b) Ciliary body contracts Ciliary (c) Suspensory ligament relaxes. body Suspensory ligament.

Question 18: Ora serrata is
(a) Centre point of macula lutea
(b) Area devoid of receptor cells
(c) Area between sensory and non-sensory part of retina
(d) Part of choroid adjacent to retina possessing light reflecting guanine crystals
Show Answer & Explanation

Answer: (c) Area between sensory and non-sensory part of retina

Explanation:
1. Ora serrata is the section of retina which present between and non-sensory portions.

Question 19: The cornea is very important component of the human eye. The main function of it is to
(a) Change the shape of the lens to enable the image to be focused on the retina
(b) Provide structural support to the eye
(c) Absorb the O2 from atmosphere
(d) Refract the light towards the retina, helps in maximum focussing
Show Answer & Explanation

Answer: (d) Refract the light towards the retina, helps in maximum focussing

Explanation:
1. Cornea's primary function is to refract light waves to converge on retina.

Question 20: Assertion (A): Presence of myelin sheath increases the rate of conduction of nerve impulse.
Reason (R): Ionic channels are absent in the area covered by myelin sheath therefore, depolarization occurs only at the nodes of Ranvier, resulting in saltatory or jumping conduction.
(a) Both Assertion and Reason are true and the Reason is a correct explanation of the Assertion.
(b) Both Assertion and Reason are true but the Reason is not a correct explanation of the Assertion.
(c) Assertion is true but the Reason is false.
(d) Both Assertion and Reason are false.
Show Answer & Explanation

Answer: (c) Assertion is true but the Reason is false.

Explanation:
1. Presence of myelin sheath causes fast conduction ionic channels are less in between nodes of Ranvier and concentrated more in node of Ranvier.

Question 21: Assertion (A): Receptors in the tendon, joints give information regarding the position and movements of different parts of the body.
Reason (R): These are termed as noci-receptors.
(a) Both Assertion and Reason are true and the Reason is a correct explanation of the Assertion.
(b) Both Assertion and Reason are true but the Reason is not a correct explanation of the Assertion.
(c) Assertion is true but the Reason is false.
(d) Both Assertion and Reason are false.
Show Answer & Explanation

Answer: (c) Assertion is true but the Reason is false.

Explanation:
1. Receptors present in tendon, ligaments joints give information regarding different body parts and called proprioceptors, Noci-receptors are pain receptors.

Question 22: Assertion (A): Transmission of the nerve impulse across a synapse is accomplished by neurotransmitters.
Reason (R): Transmission across a synapse usually requires neuro-transmitters because there is small space, i.e., synaptic cleft, that separates one neuron from another.
(a) Both Assertion and Reason are true and the Reason is a correct explanation of the Assertion.
(b) Both Assertion and Reason are true but the Reason is not a correct explanation of the Assertion.
(c) Assertion is true but the Reason is false.
(d) Both Assertion and Reason are false.
Show Answer & Explanation

Answer: (a) Both Assertion and Reason are true and the Reason is a correct explanation of the Assertion.

Explanation:
1. Transmission of nerve impulses across a synaptic cleft (a small space separating two (10 – 20 mm, neurons), occurs with the help of neurotransmitters due to presence of space, this is known as chemical synapse while in the electrical synapse ( 5nm) does not require neuro transmitter due to low space.

Question 23: Assertion (A): Sense organs, do not interpret the stimulus, it is done by brain.
Reason (R): Sense organs are transducers. They transform the energy of a stimulus to the energy of nerve impulses.
(a) Both Assertion and Reason are true and the Reason is a correct explanation of the Assertion.
(b) Both Assertion and Reason are true but the Reason is not a correct explanation of the Assertion.
(c) Assertion is true but the Reason is false.
(d) Both Assertion and Reason are false.
Show Answer & Explanation

Answer: (a) Both Assertion and Reason are true and the Reason is a correct explanation of the Assertion.

Explanation:
1. Sense organs act as transducers, they transform the sensation into nerve impulse and transmit via sensory neuron to the brain where the association and interpretation of the sensation occurs in their respective sensory areas.

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Neural Control and Coordination Objective Questions & Solutions for NEET Biology

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