Each Nerve Impulse to a Muscle Fiber Is Able to Create

question 93

Multiple Choice

Each nerve impulse to a muscle fiber is able to create just one twitch of that fiber because

• A) acetylcholine is a weak neurotransmitter only capable of generating one twitch at a time.
• B) Acetylcholinesterase breaks down acetylcholine immediately after the contraction is signaled.
• C) The sarcolemma is only able to release calcium once per millisecond.
• D) The muscle fiber is easily fatigued, so it can only twitch once before needing an interval of rest.

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