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The sarcoplasmic reticulum (SR) is a membrane-bound structure found within muscle cells that is similar to the smooth endoplasmic reticulum in other cells. The main function of the SR is to store calcium ions (Ca 2+).
9 Οκτ 2023 · The Sarcoplasmic reticulum (SR) is a unique form of smooth endoplasmic reticulum of skeletal muscle cells. Like the endoplasmic reticulum of other cells, it is a network of closed sac-like membranes found distributed throughout the cell. It spans the sarcomere and encloses the contractile myofilaments in striated muscle cells.
sarcoplasmic reticulum, intracellular system of closed saclike membranes involved in the storage of intracellular calcium in striated (skeletal) muscle cells. Each segment of the sarcoplasmic reticulum forms a cufflike structure surrounding a myofibril, the fine contractile
The sarcoplasmic reticulum is a special form of smooth endoplasmic reticulum found in association with the T tubules in the sarcoplasm of striated muscle and comprising a system of cisternae and tubules forming a plexus around each myofibril.
The specialized smooth endoplasmic reticulum, called the sarcoplasmic reticulum (SR), stores, releases, and retrieves calcium ions (Ca ++). The plasma membrane of muscle fibers is called the sarcolemma (from the Greek sarco, which means “flesh”) and the cytoplasm is referred to as sarcoplasm (Figure 10.2.2).
The sarcoplasmic reticulum of skeletal muscle cells is a highly ordered structure consisting of an intricate network of tubules and cisternae specialized for regulating Ca 2+ homeostasis in the context of muscle contraction.
1 Απρ 2024 · Similar to the cytoplasm of other cells, it bears several additional organelles inculding ribosomes, Golgi apparatus and specialized endoplasmic reticulum called sarcoplasmic reticulum, which stores and releases calcium ions (Ca 2+) crucial for muscle contraction.
