The release of calcium ions from the sarcoplasmic reticulum in response to an action potential is known as ________.
A) power stroke
B) sliding filament theory
C) tropomyosin
D) excitation-contraction coupling

Question

Quizplus · Accepted Answer

The release of calcium ions from the sarcoplasmic reticulum in response to an action potential is a crucial step in excitation-contraction coupling, the process by which a muscle fiber contracts. A is incorrect as the power stroke is the movement of the myosin head during muscle contraction. B is incorrect as the sliding filament theory explains how muscle contraction occurs at a molecular level, but does not specifically refer to the release of calcium ions from the sarcoplasmic reticulum. C is incorrect as tropomyosin is a protein involved in regulating muscle contraction, but it is not directly involved in the release of calcium ions from the sarcoplasmic reticulum.

The Release of Calcium Ions from the Sarcoplasmic Reticulum in Response