In order for a muscle contraction to occur, cross-bridges must form between which one of the following structures within a muscle cell?
A) the plasma membrane and the sarcoplasmic reticulum
B) troponin and tropomyosin
C) calcium and tropomyosin
D) acetylcholine and muscle cell receptors
E) actin and myosin

Question

Quizplus · Accepted Answer

Cross-bridges form between actin and myosin filaments within a muscle cell, which is essential for muscle contraction.

In Order for a Muscle Contraction to Occur, Cross-Bridges Must