What is a sarolemma?

Answer 1

The sarcolemma is the plasma membrane that encloses muscle fibers (myofibers) in skeletal and cardiac muscle. It plays a crucial role in maintaining the cell's electrochemical gradient, facilitating muscle contraction by allowing the passage of ions and signaling molecules. Additionally, the sarcolemma contains specialized structures such as T-tubules that help transmit action potentials into the muscle fiber, ensuring synchronized contraction.