Energized myosin heads bind to actin only when ____ is present.
A) myosin
B) AMP
C) calcium
D) ATP
E) sodium

Name: Energized myosin heads bind to actin only when ____ is present. A) myosin B) AMP C) calcium D) ATP E) sodium
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Question

Energized myosin heads bind to actin only when ____ is present.
A) ​myosin
B) ​AMP
C) ​calcium
D) ​ATP
E) ​sodium

Quizplus · Accepted Answer

Calcium ions are necessary for the binding of energized myosin heads to actin, as they bind to troponin, causing a conformational change that exposes the binding sites on actin.

Energized Myosin Heads Bind to Actin Only When ____ Is