Question

Altering the concentrations of which of the following ions will have an effect on muscle contraction?...

Altering the concentrations of which of the following ions will have an effect on muscle contraction? You may select more than one answer.

Potassium

Calcium

Magnesium

Sodium

Science   Anatomy-And-Physiology   
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Answer #1

Answer

Calcium , Magnesium

Explanation

  • Calcium play a significant role in muscle contraction .
  • It activate actin-myosin interaction through intervention of tropomyosin and troponin .
  • Magnesium play a role in muscle contraction by stimulating calcium re-uptake by calcium activated ATP ase of the sarcoplasmic reticulum
  • It also help in translocation of calcium ion through smooth cell membranes
  • Calcium and magnesium play importnat role in muscle contraction , hence altering the concentration of these ions will have effect on muscle contraction.
  • Sodium and postassium doesnot play a significant role in muscle contraction hence option A and D are wrong.
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