The sarcoplasmic reticulum conducts action potentials that spread across the sarcolemma into the cell.

Name: The sarcoplasmic reticulum conducts action potentials that spread across the sarcolemma into the cell.
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The sarcoplasmic reticulum is responsible for releasing calcium ions, which trigger muscle contraction, but it does not conduct action potentials. Action potentials are conducted along the sarcolemma (cell membrane) and into the muscle cell via T-tubules.

The Sarcoplasmic Reticulum Conducts Action Potentials That Spread Across the Sarcolemma