Increases in the amount of cytoplasmic calcium required to initiate a muscle contraction are mediated by the coupling between a _______on the T tubule and a__________ on the membrane of the sarcoplasmic reticulum.

Question

Quizplus · Accepted Answer

The correct coupling for initiating a muscle contraction involves the dihydropyridine receptor on the T tubule and the ryanodine receptor on the membrane of the sarcoplasmic reticulum. This interaction facilitates the release of calcium from the sarcoplasmic reticulum into the cytoplasm, triggering muscle contraction.

Increases in the Amount of Cytoplasmic Calcium Required to Initiate