Which of the following ions help in muscle contraction ?

Options

A. `K^(+)` and `Mg^(++)`
B. `Na^(+)` and `K^(+)`
C. `Ca^(++)` and `Na^(++)`
D. `Ca^(++)` and `Mg^(++)`

Answer

D

Explanation

In muscle contraction, both `Ca^(2+)` and `Mg^(2+)` are used. `Ca^(2+)` helps in the formation of actomyosin by combinaing actin and myosin proteins. This will provide contraction in muscle. ATPase activity of myosin requires both `Ca^(2+)` and `Mg^(2+)` . This helps in release of energy. This energy is used up in the contraction of muscle.