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BIO NMDCAT Cytoplasmic Organelles
nmdcat.online July 4, 2026

26. In muscle physiology, the specialized modification of the smooth endoplasmic reticulum dedicated to the rapid storage and release of calcium ions (Ca2+) is the

A. Sarcoplasmic reticulum
✓
B. T-tubule network
C. Sarcolemma
D. Golgi cisternae

📝 Explanation

The sarcoplasmic reticulum is a specialized SER that hoards calcium ions, releasing them into the sarcoplasm to trigger muscle contraction.

📖 Additional Information

  • Sarcoplasmic reticulum
  • T-tubule network
  • Sarcolemma
  • Golgi cisternae

The sarcoplasmic reticulum is a specialized SER that hoards calcium ions, releasing them into the sarcoplasm to trigger muscle contraction.

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