PHYSIOLOGY
SKELETAL MUSCLE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Within the axonal endings are many small vesicles containing a neurotransmitter substance called ____
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acetylcholine
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isotonic contraction
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fatigue
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isometric contraction
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Explanation:
Detailed explanation-1: -Synaptic vesicles (SVs) are small, electron-lucent vesicles that are clustered at presynaptic terminals. They store neurotransmitters and release them by calcium-triggered exocytosis. SVs are made locally at the terminals and are regenerated after exocytosis.
Detailed explanation-2: -Cholinergic neurons release ACh from axon terminals. ACh is synthesized from choline, which is transported into neurons.
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