NEET Zoology Neural Control and Coordination NEET s MCQ Questions - Practice Now

Question 1

Select the incorrect statement regarding synapses:

Accepted Answer

Impulse transmission across a chemical synapse is always faster than that across an electrical synapse.

Answer

The membranes of presynaptic and postsynaptic neurons are in close proximity in an electrical synapse.

Answer

Electrical current can flow directly from one neuron into the other across the electrical synapse.

Answer

Chemical synapses use neurotransmitters.

Question 2

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?

Accepted Answer

Sympathetic nervous system is activated releasing epinephrine and nor-epinephrine from adrenal medulla

Answer

Sympathetic nervous system is activated releasing epinephrine and nor-epinephrine from adrenal cortex

Answer

Neurotransmitters diffuse rapidly across the cleft and transmit a nerve impulse

Answer

Hypothalamus activates the parasympathetic division of brain

Question 3

Which one of the following statements is not correct?

Accepted Answer

Retinal is a derivative of vitamin C

Answer

Retinal is the light absorbing portion of visual photopigments

Answer

In retina, the rods have the photopigment rhodopsin while cones have three different photopigments

Answer

Rhodopsin is the purplish-red protein present in rods only

Question 4

Choose the correct statement.

Accepted Answer

Photoreceptors in the human eye are depolarized during darkness and become hyperpolarized in response to the light stimulus.

Answer

Nociceptors respond to changes in pressure

Answer

Meissner's corpuscles are thermoreceptors.

Answer

Receptors do not produce graded potentials.

Question 5

In mammalian eye, the fovea is the centre of visual field, where ___________.

Accepted Answer

High density of cones occurs, but has no rods

Answer

More rods than cones are found

Answer

The optic nerve leaves the eye

Answer

Only rods are present

Question 6

Which of the following regions of the brain is incorrectly paired with its function?

Accepted Answer

Cerebelllum- language comprehension

Answer

Cerebrum - Calculation and contemplation

Answer

Medulla oblongata- homeostatic control

Answer

Corpus callosum- communication between the left and right cerebral cortices

Question 7

Select the answer with correct matching of the structure, its location and function.

Accepted Answer

2

Answer

1

Answer

3

Answer

4

Question 8

When a neuron is in resting state, i.e., not conducting any impulse, the axonal membrane is

Accepted Answer

Comparatively more permeable to K⁺ ions and nearly impermeable to Na⁺ ions

Answer

Comparatively more permeable to Na⁺ ions and nearly impermeable to K⁺ ions

Answer

Equally permeable to both Na⁺ and K⁺ ions

Answer

Impermeable to both Na⁺ and K⁺ ions

Question 9

Parts A, B, C and D of the human eye are shown in the diagram. Select the option which gives correct identification along with its functions/characteristics:

Accepted Answer

A - Retina - contains photoreceptors - rods and cones

Answer

B - Blind spot - has only a few rods and cones

Answer

C - Aqueous chamber - reflects the light which does not pass through the lens

Answer

D - Choroid - Its anterior part forms ciliary body

Question 10

Good vision depends on adequate intake of carotene-rich food. Select the best option from the following statements.

(a) Vitamin A derivatives are formed from carotene

(b) The photopigments are embedded in the membrane discs of the inner segment

(c) Retinal is a derivative of Vitamin A

(d) Retinal is a light absorbing part of all the visual photopigments

Accepted Answer

a, c and d

Answer

a and b

Answer

a and c

Answer

b, c and d

zoology-neet / neural-control-and-coordination-neet-mcqs

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