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Which of these ions are abundant in the sarcoplasmic reticulum?

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in Biology – Class 11 by (272k points)
Which of these ions are abundant in the sarcoplasmic reticulum?

(a) Magnesium

(b) Sodium

(c) Potassium

(d) Calcium

The question was posed to me during an interview.

The query is from Locomotion & Movement topic in division Locomotion and Movement of Biology – Class 11

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The correct option is (d) Calcium

To explain: The sarcoplasmic reticulum is the endoplasmic reticulum present in the sarcoplasm of the muscle cell or the muscle fibre. The sarcoplasmic reticulum contains a large number of calcium ions.

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