The Immediate Source of Energy for Muscle Contraction is _______

Question

The immediate source of energy for muscle contraction is _______.
A) lactic acid
B) ATP
C) glycogen
D) oxygen

Accepted Answer

The immediate source of energy for muscle contraction is ATP (adenosine triphosphate). ATP is broken down into ADP (adenosine diphosphate) by the muscle cells, releasing energy that powers the contraction. Lactic acid and glycogen are not the immediate sources of energy for muscle contraction. Oxygen is necessary for the complete breakdown of glucose, but it is not the immediate source of energy for muscle contraction.