These are defined as a set of membranous channels that extend inward from the plasma membrane of the muscle cell and pass all the way through the cell.
A) sarcomeres
B) myofibrils
C) transverse tubules
D) cisternae

Question

Quizplus · Accepted Answer

Transverse tubules, also known as T-tubules, are invaginations of the plasma membrane that penetrate deep into the muscle fiber. They allow for the rapid transmission of action potentials throughout the entire muscle cell, which is necessary for synchronous contraction. Sarcomeres are the basic contractile units of muscle fibers, myofibrils are composed of sarcomeres and are responsible for muscle contraction, and cisternae are specialized regions of the sarcoplasmic reticulum where calcium ions are stored.

These Are Defined as a Set of Membranous Channels That