Question

What are the steps of muscle cell contraction?

• A. Attachment, detachment, relaxation, re-cocking
• B. Power stroke, relaxation, re-cocking, attachment
• C. Attachment, power stroke, detachment, re-cocking
• D. Relaxation, attachment, detachment, power stroke

Hint:

These steps involve the interaction of actin and myosin filaments.

Answer 1

The Correct Option is A

Muscle contraction occurs in these phases:

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• Attachment (myosin head links to actin)
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• Power stroke (myosin head pulls the actin filament)
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• Detachment (myosin head separates from actin)
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• Re-cocking (myosin head prepares to bind again)
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