What is the power stroke?

A. The movement of myosin head while attached to actin myofilament
B. A T tubule and two adjacent terminal cisternae
C. The combination of myosin heads with active sites on actin molecules
D. A protein found along the groove of the F-actin double helix
E. After exercise, the O2 taken in that exceeds the O2 required for resting metabolism


Answer: A

Anatomy & Physiology

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