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During muscle cell contraction, what happens because of Ca ++ binding to troponin

saraalalwane
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2022-09-20
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During muscle cell contraction, what happens because of Ca ++ binding to troponin?

  1. The binding site on actin is uncovered.
  2. Acetylcholine (ACh) is released.
  3. The cross-bridge disengages from the thin fi lament.
  4. ATP hydrolyses to ADP
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saraalalwane
2022-09-20
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A: Troponin causes tropomyosin (which covers he binding site of actin) to be shifted away.

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