Which of the Following Is NOT a Part of the Excitation-

question 123

Multiple Choice

Which of the following is NOT a part of the excitation- contraction coupling in cardiac muscle?

• A)An action potential travels along transverse tubules.
• B)Calcium binds to calmodulin in the cytosol.
• C)Calcium channels in the sarcoplasmic reticulum open, allowing calcium ions to enter the cytosol.
• D)Calcium channels in the plasma membrane open, allowing calcium ions to enter the cell.
• E)Calcium opens calcium channels in the sarcoplasmic reticulum.

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