Which neurotransmitter is involved in the transmission of impulse at the neuromuscular junction?

Correct option is B

Correct Answer: (b)
Explanation:
Acetylcholine (ACh) is the neurotransmitter released at the neuromuscular junction that triggers muscle contraction by depolarizing the muscle membrane.
Information Booster:
Action potential reaches the synaptic terminal of motor neuron.
Synaptic vesicles release acetylcholine into the synaptic cleft.
ACh binds to receptors on muscle fiber → depolarization → muscle contraction.
The enzyme acetylcholinesterase quickly hydrolyzes ACh to stop contraction.
Other neurotransmitters like serotonin, dopamine, and epinephrine act in the brain, not in neuromuscular transmission.
Additional Information:
(a) Serotonin – affects mood and sleep, not muscle function.
(c) Dopamine – related to movement control in CNS (Parkinson’s disease).
(d) Epinephrine – hormone, not a neurotransmitter at neuromuscular junctions.