Question

Which are involved in muscle contraction?
(a) Ca²⁺ & Mg²⁺ (b) Ca²⁺ & Na⁺
(c) Na⁺ & K⁺(d) Mg²⁺ & K⁺

Answer 1

Answer:

(a) ca+ and mg+.......

Answer 2

Ions involved in the muscle contraction is:

Ca2+ and Mg 2+ ions are involved in muscle contraction.

• Ca2+ is the ion that facilitates the contraction of muscles and Mg2+ acts as regulatory ion it will regulate muscle contraction.

• Calcium is released by sarcoplasmic reticulum then it will bind with the protein molecule troponin.

• Troponin opens the active binding sites on the actin, thick and thin filaments interact with each other so muscle contraction will occur.

• Mg2+ ions regulate the contraction of muscles and relax them.