Question by Kelly: How does calcium affect muscle contraction?
a. it is released from the T tubules in response to an action potential to initiate contraction.
b. the binding of acetylcholine opens calcium channels inthe plasma membrane, creating an action potential that travels down the T tubules.
c. it binds to tropomyosin and helps to stabilize cross-bridge formation.
d. its binding to troponin causes tropomyosin to move away from the myosin-binding sites of the actin filament.
e.its release from the sacroplasmic reticulum changes the membrane potential of the muscle cell so that contraction can occur.
Best answer:
Answer by Peter S
d. its binding to troponin causes tropomyosin to move away from the myosin-binding sites of the actin filament.
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