MCQ
The set of ions necessary for muscle contraction is
  • $\mathrm{Ca}^{2+}$ and $\mathrm{Mg}^{2+}$
  • B
    $\mathrm{Na}^{+}$and $\mathrm{Mg}^{2+}$
  • C
    $\mathrm{Na}^{+}$and $\mathrm{K}^{+}$
  • D
    $\mathrm{Na}^{+}$and $\mathrm{Ca}^{2+}$

Answer

Correct option: A.
$\mathrm{Ca}^{2+}$ and $\mathrm{Mg}^{2+}$
a
$\mathrm{Ca}^{2+}$ and $\mathrm{Mg}^{2+}$ are necessar for muscle contraction.

Myosin $+$ Actin $\underset{\mathrm{Ca}^{2}+}{\stackrel{\text { ATP }}{\longrightarrow}}$ Actomyosin

ATP $+\mathrm{H}_{2} \mathrm{O} \frac{\text { Myosin ATP are }}{\mathrm{Ca}^{2+} / \mathrm{Mg}^{2+}}{ }^{2+} \mathrm{ADP}+\mathrm{P}_{\mathrm{i}}+$ energy

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