Which of the following is an excitatory neurotransmitter secreted by motor neurons innervating skeletal muscle?
a) gamma aminobutyric acid
b) acetylcholine
c) cholinesterase
d) norepinephrine

B) acetylcholine

Explanation:

Acetylcholine is an excitatory neurotransmitter secreted by motor neurons innervating skeletal muscle.

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