Question

Acetylcholine participates in the nerve impulse transmission across a synapse. Acetylcholine is secreted by adrenergic fibres.

• A. If both Assertion and Reason are true and the Reason is a correct explanation of the Assertion
• B. If both Assertion and Reason are true but Reason is not a correct explanation of the Assertion
• C. If Assertion is true but the Reason is false
• D. If both Assertion and Reason are false

Answer 1

Answer: (C)

If Assertion is true but the Reason is false

Answer 2

Acetylcholine is secreted by cholinergic neurons. Acetylcholine made by these neurons taken up into synaptic vesicles by a vesicular transporter. It must be rapidly removed from the synapse if repolarization is to occur. The removal occurs by way of hydrolysis of acetylcholine to choline and acetate, a reaction catalysed by acetylcholinesterase.