The Ability to Develop Increasing Levels of Force in an Intact

question 1

Multiple Choice

The ability to develop increasing levels of force in an intact muscle composed of both fast- and slow-twitch muscle fibers typically involves:

• A)Recruitment of slow-twitch muscle fibers before fast-twitch muscle fibers.
• B)Tetany of fast-twitch muscle fibers at lower stimulus frequencies than those for tetany of slow-twitch muscle fibers.
• C)A progressive recruitment of more muscle fibers within a given motor unit.
• D)A progressive increase in the amplitude of the intracellular Ca⁺⁺ transient.
• E)A progressive decrease in the threshold for an action potential in the skeletal muscle.

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