Question

question 20
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a single action potential from a motor neuron will produce a single contraction in the muscle fibers of its motor unit.
this isolated contraction is referred to as what?
motor unit
twitch
incomplete tetanus
hypertonia

Explanation:

• A motor unit is a motor neuron and the muscle fibers it innervates, not the isolated contraction.
• Incomplete tetanus is a sustained contraction due to repeated stimuli, not a single contraction.
• Hypertonia is a condition of increased muscle tone, not related to a single contraction.
• A twitch is defined as a single contraction in muscle fibers caused by a single action potential from a motor neuron.

Answer:

Twitch