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Sarcoplasmic reticulum is found in ________________

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Sarcoplasmic reticulum is found in ________________

(a) liver cells

(b) kidney cells

(c) muscle cells

(d) neurons

This question was posed to me in semester exam.

The question is from Cytoplasmic Membrane Systems in portion Cytoplasmic Membrane Systems of Cell Biology

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Correct option is (c) muscle cells

Easiest explanation: Smooth endoplasmic reticulum sequesters calcium ions within the cytoplasm of the cell and controlled release of Ca^2+ from the SER of cardiac and skeletal muscle cells triggers contraction. Smooth endoplasmic reticulum (SER) in the aforementioned cells is known as sarcoplasmic reticulum.

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