Which of the Following Forms Cross-Bridges with Actin

Question

Which of the following forms cross-bridges with actin?
A) Sarcoplasmic reticulum
B) T tubules
C) Myosin
D) Sarcolemma

Accepted Answer

Myosin is the thick filament in muscle fibers that forms cross-bridges with actin, the thin filament, during muscle contraction. The sarcoplasmic reticulum and T tubules are involved in the regulation of calcium release, while the sarcolemma is the plasma membrane of the muscle cell.