Which of the following cell organelles forms the sarcoplasmic reticulum in striated muscle cells?

Aendoplasmic reticulum
Bgolgi apparatus
Clysosomes
Dmitochondria

Correct answer: A. endoplasmic reticulum

The sarcoplasmic reticulum is a specialized form of the endoplasmic reticulum found in muscle cells, responsible for storing and releasing calcium ions.

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