Action potentials can be conducted into the muscle along invaginations of the sarcolemma,or __________.
A)sarcoplasmic reticulum
B)T-tubules
C)terminal cisternae
D)sarcotubes

Question

Quizplus · Accepted Answer

T-tubules are invaginations of the sarcolemma that allow the action potential to be conducted into the muscle fiber. Sarcoplasmic reticulum, terminal cisternae, and sarcotubes are all structures within the muscle fiber that store and release calcium ions, but they do not directly conduct the action potential.

Action Potentials Can Be Conducted into the Muscle Along Invaginations