All of the Following Occur During the Latent Period of Muscle

Multiple Choice

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.