Which of the Following Statements Concerning the Length-Tension Relationship of Skeletal

question 199

Multiple Choice

Which of the following statements concerning the length-tension relationship of skeletal muscle is incorrect?

• A) when a muscle is maximally stretched, it can develop the most tension upon contraction because the thin filaments can slide in a maximal distance.
• B) maximum tension can be developed if the muscle is at its lowest at the onset of contraction.
• C) in the body, the relaxed length of muscle is at its optimal length.
• D) when the initial length of muscle prior to contraction becomes very short, tension is decreased during contraction because of thin filament overlap, because the thick filaments are compressed against the Z lines, and because not as much Ca2+ is released during excitation-contraction coupling.
• E) the tension that can be achieved during a tetanic contraction is less when a muscle is shorter or longer than its optimal length at the onset of contraction.

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