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Sarcoplasmic reticulum

Smooth ER found in muscle cells; site of the calcium pump.

Specialized ER in striated muscle that stores Ca2+ and releases it via ryanodine receptors to drive contraction, then pumps Ca2+ back via SERCA for relaxation.

How one textbook covers it

  • Advanced Nutrition and Human Metabolism, 8th ed. (Gropper) — Glossary

    Specialized ER in striated muscle that stores Ca2+ and releases it via ryanodine receptors to drive contraction, then pumps Ca2+ back via SERCA for relaxation.

Related terms

Endoplasmic reticulum, Ryanodine receptor