Which of the following is the major reason for the latent period observed betwee

Question

Which of the following is the major reason for the latent period observed between the arrival of an action potential at the motor end plate and the subsequent generation of tension in a skeletal muscle? a. Action potentials move slowly through the T-tubules. b. The actin and myosin need to change shape so that they overlap. c. Ca++ must be released from the sarcoplasmic reticulum, travel to the thin filaments, and subsequently cause tropomyosin to move. d. The foot proteins have a long absolute refractory period. e. All of the above contribute to the latent period.

Explanation / Answer

c. Ca++ must be released from the sarcoplasmic reticulum, travel to the thin filaments, and subsequently cause tropomyosin to move.

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