Which molecule prevents a muscle contraction from occurring when the muscle is at rest?
A) Calcium
B) Troponin-tropomyosin
C) Actin
D) Myosin

Name: Which molecule prevents a muscle contraction from occurring when the muscle is at rest? A) Calcium B) Troponin-tropomyosin C) Actin D) Myosin
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Question

Quizplus · Accepted Answer

Troponin-tropomyosin complex blocks the binding sites on actin filaments, preventing myosin from attaching and thus preventing muscle contraction when the muscle is at rest.

Which Molecule Prevents a Muscle Contraction from Occurring When the Muscle