The release of which of the following nutrients from muscle cell storage sites stimulates muscle contraction?
A) phosphorus
B) potassium
C) sodium
D) calcium

Question

Quizplus · Accepted Answer

Calcium is the key nutrient released from muscle cell storage sites that triggers muscle contraction. When a muscle receives a signal from a nerve, calcium is released from storage sites and binds to proteins in the muscle fibers, causing them to slide past each other and contract. Phosphorus, potassium, and sodium are also important nutrients for muscle function, but they do not directly stimulate muscle contraction.

The Release of Which of the Following Nutrients from Muscle