Which of these statements applies to T tubules

Question

Quizplus · Accepted Answer

T tubules, also known as transverse tubules, are invaginations of the sarcolemma (cell membrane) that run perpendicular to the myofibrils. They provide a means of rapidly transmitting the action potential from the surface into the central portions of the muscle fibre, which triggers the release of calcium ions from the sarcoplasmic reticulum and initiates muscle contraction. T tubules are not involved in storing calcium or ATP.

Which of These Statements Applies to T Tubules