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Question

Which of organelle regulates the muscle contraction during internal movements?

A
Ribosomes
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B
Golgi bodies
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C
Sarcoplasmic reticulum
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D
Both A and B
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Solution

The correct option is C Sarcoplasmic reticulum
  • Sarcoplasmic reticulum is similar to endoplasmic reticulum present in other cells. It is present in sarcoplasm (cytoplasm of the muscle cell) of the muscle fiber (muscle cell).
  • The main function of the Sarcoplasmic reticulum is to store calcium ions (Ca2+).
  • When nerve signal reaches the neuromuscular junction it triggers the release of calcium from sarcoplasmic reticulum which in turn facilitates muscle contraction by binding to troponin.
  • Hence the organelle regulates the muscle contraction during internal movements is sarcoplasmic reticulum.
  • So, the correct answer is'Sarcoplasmic reticulum'.

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