What Event Is Responsible for the Excitation-Contraction Coupling in the Myocardium

question 82

Multiple Choice

What event is responsible for the excitation-contraction coupling in the myocardium?

• A) increase of Ca²⁺ concentration in the sarcoplasm
• B) removal of Ca²⁺ from the troponin
• C) transport of Ca²⁺ to sarcoplasm by the ATPase
• D) inactivation of Ca²⁺ release channels in the SR

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