Which of the Following Is NOT a Part of the Excitation

question 51

Multiple Choice

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

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

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