When muscle is stimulated directly to contract, does the rising phase of the twitch begin immediately? If not, why not?

Question

Quizplus · Accepted Answer

The rising phase of a muscle twitch does not begin immediately because there are necessary electrical and chemical changes that must first occur at the muscle membrane, such as the propagation of the action potential and the release of calcium ions, which trigger the muscle contraction process.

When Muscle Is Stimulated Directly to Contract, Does the Rising