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.
Correct Answer:
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