Definitions for "Sarcoplasmic reticulum"
Network of internal membranes in the cytoplasm of a muscle cell that contains high concentrations of sequestered Ca2+ that is released into the cytosol during muscle excitation.
Network of membranes, derived from the smooth endoplasmic reticulum, that surrounds each myofibril in a muscle cell and sequesters Ca2+ ions. Depolarization (stimulation) of a muscle cell induces release of Ca2+ ions into the cytosol, triggering coordinated contraction along the length of the cell. Endoplasmic reticulum in muscle fiber ; site of storage and release of calcium ions.
Smooth endoplasmic reticulum of muscle fibres; calcium store, which is released and sequestered during and after contractions.