All of the following occur during the latent period of muscle contraction EXCEPT which one?
A) Myofibrils shorten.
B) Calcium is released from the sarcoplasmic reticulum.
C) Muscle cell membrane initiates an electrical impulse, which travels into the muscle cell.
D) Myosin heads bind to actin filaments.
E) Troponin-tropomyosin complex shifts, exposing myosin heads.

Question

Quizplus · Accepted Answer

During the latent period, the myofibrils do not shorten. This period involves the preparation for contraction, including calcium release, electrical impulse initiation, myosin binding, and exposure of binding sites, but not the actual shortening of myofibrils.

All of the Following Occur During the Latent Period of Muscle