Which of the following statements about excitation -contraction coupling in skeletal muscle is FALSE?
A) Calcium binds to troponin, causing a shift in tropomyosin, thereby exposing the binding sites on actin for myosin.
B) DHP receptors on the T tubules detect changes in voltage and communicate to ryanodine receptors on the sarcoplasmic reticulum to open calcium channels.
C) An end -plate potential triggers an action potential on the sarcolemma.
D) An action potential in the sarcolemma stimulates the opening of voltage -gated calcium channels in the plasma membrane and the sarcoplasmic reticulum.
E) Calcium ATPases in the sarcoplasmic reticulum are necessary for relaxation of the muscle.
Correct Answer:
Verified
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Q24: The binding of calcium to troponin will
Q26: When an action potential is generated within
Q27: In order to allow discrete contractile events
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A) a spinal
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Q30: Which of the following is NOT part
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