PHYSIOLOGY
SLIDING FILAMENT MODEL
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Cross bridge is what stage?
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1
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2
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3
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4
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Explanation:
Detailed explanation-1: -The model hypothesizes two types of cross-bridge interactions: 1) cycling phosphorylated cross bridges and 2) noncycling dephosphorylated cross bridges ("latch bridges").
Detailed explanation-2: -the answer: The first step in the crossbridge cycle is that attachment of myosin crossbridges (or heads) to exposed binding sites on actin (due to previous action of Ca, troponin and tropomyosin).
Detailed explanation-3: -The influx of calcium, triggering the exposure of binding sites on actin. The binding of myosin to actin. The power stroke of the myosin head that causes the sliding of the thin filaments. The binding of ATP to the myosin head, which results in the myosin head disconnecting from actin. More items
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