Free Neural Control And Coordination (Daily Quiz: 11) NEET Biology Questions & Answers with Detailed Explanation & Full Review

Question-1

The given diagram shows different parts of a human eye with one part labeled as X. Which of the following statement is correct regarding label X?

(a) It is the coloured portion of vascular tunic.

(b) It is the opening in lens that permits light into the inner chambers of the eye.

(c) It is a biconcave structure that changes shape to bring objects into focus.

(d) It is thick, jelly-like substance in the posterior compartment of the eye.

Question-2

Assertion:
Impulse transmission across an electrical synapse is always faster than that across a chemical synapse.
Reason:
At electrical synapses, the membranes of pre- and post-synaptic neurons are in very close proximity.

(a) If both the assertion and reason are true but the reason is not a correct explanation of the assertion.

(b) If both the assertion and the reason are true and the reason is a correct explanation of the assertion.

(c) If the assertion is true but the reason is false.

(d) If both the assertion and reason are false.

Question-3

Drugs that alter the permeability of the plasma membrane of a neuron have which of the following effects on nerve impulse conduction?

(a) They prevent movement of sodium and potassium ions into and out of the cell, thereby stopping the transmission of the impulse.

(b) They prevent the release of neurotransmitters at synapses.

(c) They primarily affect conduction along the axon.

(d) All of the above

Question-4

Destruction of the anterior horn cells of the spinal cord would result in loss of

(a) Commissural impulses

(b) Voluntary motor impulse

(c) Integrating impulses

(d) Sensory impulses

Question-5

In a man, abducens nerve is injured. Which one of the following functions will be affected?

(a) Movement of the eyeball

(b) Swallowing

(c) Movement of the tongue

(d) Movement of the neck