Muscular and nervous excitability is reduced by

N a^{+}

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K^{+}

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C a^{2 +}

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M g^{2 +}

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Solution

The correct option is B $K^{+}$
Potassium is an important mineral that functions as an electrolyte.
It helps regulate fluid balance, nerve signals and muscle contractions and nervous excitability.
Increased extracellular potassium levels result in depolarization of the membrane potentials of cells due to the increase in the equilibrium potential of potassium.
This depolarization opens some voltage-gated sodium channels but also increases the inactivation at the same time. Hence, Muscular and nervous excitability is reduced by K+.
So, the correct answer is 'K+'.

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.
if true enter 1, else enter 0.

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