Stretching a Skeletal Muscle Beyond Rest Length Reduces the Force

question 4

Multiple Choice

Stretching a skeletal muscle beyond rest length reduces the force of contraction because of:

• A)Increased Ca⁺⁺ sensitivity of actin-myosin interaction.
• B)Increased Ca⁺⁺ influx through stretch-activated channels.
• C)Decreased actin-myosin overlap.
• D)Decreased Ca⁺⁺ uptake by the SR.
• E)Decreased intracellular pH.

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