Q. Action potential in sarcolemma of muscles causes the release of
A) $Na^{+}$
B) $Cl^{-}$
C) $Ca^{2 +}$
D) $HCO_{3}^{-}$
Explanation
The action potential in the sarcolemma causes the release of $Ca^{2 +}$ ions in the sarcoplasm. Increase in the $Ca^{2 +}$ level leads to the binding of $Ca^{2 +}$ with a sub unit of troponin on the actin filaments and thereby removes the masking of actin sites for myosin
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.