Skeletal muscle contraction begins when calcium ions bind to ________.
A) energized cross-bridges
B) myosin
C) actin
D) acetylcholine receptors
E) troponin

Question

Quizplus · Accepted Answer

Calcium ions bind to troponin, causing a conformational change that moves the tropomyosin away from the myosin-binding sites on actin, allowing for cross-bridge formation between actin and myosin.

Skeletal Muscle Contraction Begins When Calcium Ions Bind to ________