Question

the step in which the action potential depolarizes the t tubules is called ____________. multiple choice excitation coupling relaxation contraction

Explanation:

In muscle - contraction process, the action potential depolarizing the T - tubules is part of the excitation phase. During excitation, an action potential is generated in the muscle cell membrane and travels down the T - tubules, triggering subsequent events in muscle contraction.

Answer:

A. excitation