Question

The chemical causing transmission of nerve impulse across synapse or end plate is

• A. Choline
• B. Acetylcholine
• C. Cholinesterase
• D. Adrenaline

Answer 1

Answer: (B)

Acetylcholine

Acetylcholine is a neurotransmitter released at the synapses of parasympathetic nerves and at neuromuscular junctions. After relaying a nerve impulse, acetylcholine is rapidly broken down by the enzyme cholinesterase. Anticholinergic drugs block the action of acetylcholine at receptor sites; anticholinesterases and acetylcholinesterase inhibitors prolong the activity of acetylcholine by blocking cholinesterase.

So, the correct answer is (B)