The “Duty Cycle” in Muscle Physiology Refers to The

Question

The “duty cycle” in muscle physiology refers to the A) Time a muscle is active B) Fraction of time in a contraction when ATP is being used up C) Fraction of total time that a muscle is active D) Ca²⁺ cycle during activation and relaxation of skeletal muscle E) The breakdown and synthesis of glycogen with each contraction

Accepted Answer

The duty cycle in muscle physiology refers to the fraction of total time that a muscle is active, indicating the proportion of time a muscle spends in contraction versus relaxation during a cycle of activity.