The chief function of the T-tubules is to:
A) provide nutrients to the muscle fiber.
B) allow for the fiber to contract.
C) allow for electrical signals to move deeper into the cell.
D) allow for the generation of new muscle fibers.

Question

Quizplus · Accepted Answer

The T-tubules are invaginations of the sarcolemma that allow for electrical signals (action potentials) to move deeper into the muscle fiber, allowing for coordinated contractions of the myofibrils. T-tubules do not provide nutrients or allow for the generation of new muscle fibers, although they are crucial for muscle contraction.

The Chief Function of the T-Tubules Is To