The energy source for muscle contraction comes from
A) actin.
B) myosin.
C) ATP.
D) calcium ions.

Question

Quizplus · Accepted Answer

ATP is the primary energy source for muscle contraction. When a muscle contracts, ATP is hydrolyzed to ADP and inorganic phosphate, releasing energy that is used to power the contraction. Actin and myosin are the proteins that interact to cause muscle contraction, but they do not directly provide energy. Calcium ions are involved in the initiation of muscle contraction, but do not provide energy themselves.

The Energy Source for Muscle Contraction Comes from