Q139 / 160 · JIPMER 2010 · Zoology
Which of the following is important for muscle contraction and nerve impulse transmission?
- A$\mathrm{Ca}^{2+}$ ions
- Correct answerB$\mathrm{Ca}^{2+}$ and $\mathrm{Mg}^{2+}$ ions
- C$\mathrm{Mg}^{2+}$ ions
- D$\mathrm{Fe}^{2+}$ ions
Solution
$\begin{array}{l|l}
\hline \text{Ion} & \text{Important for} \\
\hline \mathrm{Ca}^{2+} & \begin{array}{l}
\text{Muscle contraction and nerve impulse transmission} \
\end{array} \\
\hline \mathrm{Mg}^{2+} & \begin{array}{l}
\text{Muscle contraction} \\
\mathrm{Na}^{2+}
\end{array} \\
\hline \mathrm{K}^{+} & \begin{array}{l}
\text{Nerve impulse transmission} \\
\text{Nerve impulse transmission and muscle contraction}
\end{array} \\
\hline
\end{array}$
Hence, the correct answer is option: 'B'.