In cardiac muscle cells the release of Ca²⁺ through L-type Ca²⁺ channels depolarizes the sarcoplasmic reticulum and inhibits the release of any additional Ca²⁺ necessary for excitation-contraction coupling.

Question

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The release of Ca2+ through L-type Ca2+ channels depolarizes the sarcoplasmic reticulum and triggers the release of additional Ca2+ necessary for excitation-contraction coupling, not inhibits it.

In Cardiac Muscle Cells the Release of Ca2+ Through L-Type

In Cardiac Muscle Cells the Release of Ca²⁺ Through L-Type