When Lifting a Heavy Object, the Strength of Leg Muscle

question 89

Multiple Choice

When lifting a heavy object, the strength of leg muscle contractions is determined by the

• A) number of calcium ions released by the sarcoplasmic reticulum.
• B) number of thick and thin filaments involved in each sarcomere during contraction.
• C) amount of ATP used by each active sarcomere during muscle contraction.
• D) frequency of action potentials and number of muscle fibers stimulated.

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