PHYSIOLOGY
GENERAL PHYSIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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When the most binding sites are available to form the most crossbridges
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When the sarcomere is at its shortest length
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When the sarcomere is at its greatest length
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When the thin filaments overlap each other
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Detailed explanation-1: -This is called the length-tension relationship. The ideal length of a sarcomere to produce maximal tension occurs at 80 percent to 120 percent of its resting length, with 100 percent being the state where the medial edges of the thin filaments are just at the most-medial myosin heads of the thick filaments (Figure 2).
Detailed explanation-2: -The tension generated by a sarcomere depends on the length of the sarcomere, and there is an optimal length at which tension is maximal, This is referred to as the “optimum” length. For human muscle, this corresponds to a sarcomere length of about 2.7 m in skeletal muscle, and 2.2 m in cardiac muscle.
Detailed explanation-3: -Answer and Explanation: The correct answer: During muscle contraction, myosin cross-bridges attach to B) actin filaments. Muscle contraction is a process in which the interaction between the muscle filaments takes place.