MEDICAL PHYSIOLOGY

PHYSIOLOGY

GENERAL PHYSIOLOGY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Match the description:Calcium binds to it
A
Tropomyosin
B
Troponin
C
M line
D
Z line
Explanation: 

Detailed explanation-1: -I Introduction. The muscle protein troponin-C (TnC) contains four calcium-binding sites arranged as a pair of two-site domains.

Detailed explanation-2: -Abstract. Troponin (Tn) is the sarcomeric Ca2+ regulator for striated (skeletal and cardiac) muscle contraction. On binding Ca2+ Tn transmits information via structural changes throughout the actin-tropomyosin filaments, activating myosin ATPase activity and muscle contraction.

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