A Muscle Produces Less Force During a Twitch Than During

question 57

Multiple Choice

A muscle produces less force during a twitch than during a tetanic contraction because during a twitch

• A) peak cytoplasmic Ca²⁺ is lower.
• B) tropomyosin does not have time to unblock all of the actomyosin binding sites.
• C) myosin does not have time to bind to as many actin molecules.
• D) the elastic components of the muscle are not fully stretched.

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