MUSCLE PHYSIOLOGY

PHYSIOLOGY

MUSCLE CONTRACTION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The Ions that are responsible for activating Troponin and twisting Tropomyosin.
A
Sodium
B
Calcium
C
Potassium
D
Magnesium
Explanation: 

Detailed explanation-1: -Troponin plays a central role in the calcium-regulation of muscle contraction: Troponin is the sole calcium-binding component of thin filaments (actin-tropomyosin-troponin complex) of striated muscles. Thin filaments without troponin support contraction irrespective of calcium concentration.

Detailed explanation-2: -Calcium then binds to troponin as described above, initiating the contraction process.

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