What is the Function of the Transverse Tubule

Question

What is the function of the transverse tubule?
A)the storage of calcium ions
B)to transmit electrical impulses to the cell's interior
C)to store sodium ions
D)to allow cross-bridge attachment
E)to produce myofibrils

Accepted Answer

The function of the transverse tubule, also known as the T-tubule, is to transmit electrical impulses (action potentials) from the surface of the muscle fiber to the interior of the cell, allowing for coordinated muscle contraction. A) is incorrect as calcium ions are stored in the sarcoplasmic reticulum. C) is incorrect as sodium ions are stored in the extracellular fluid and are not associated with the T-tubule. D) is incorrect as cross-bridge attachment occurs between myosin and actin filaments within the muscle fiber, not with the T-tubule. E) is incorrect as myofibrils are the contractile elements within the muscle fiber and are not produced by the T-tubule.