As the Sarcomere Length of Skeletal Muscle Is Reduced Beyond

question 127

Multiple Choice

As the sarcomere length of skeletal muscle is reduced beyond the length where optimum force is developed,

• A) the thin filaments overlap one another with myosin bumping into the Z -line, thereby causing the force generated by crossbridges to be exerted on the sarcomere itself rather than transmitted to the ends of the muscle fiber.
• B) the amount of calcium released by the sarcoplasmic reticulum is reduced as length increases.
• C) the thin filaments are pulled away from one another, thereby reducing their ability to interact with myosin.
• D) the thick filaments are pulled away from one another, thereby reducing their ability to interact with actin.
• E) the thick filaments overlap one another, thereby reducing their ability to interact with actin.

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