Assertion : Stimulation of renin secretion will increase the volume of extracellular fluid (ECF). Reason :…
Assertion : Stimulation of renin secretion will increase the volume of extracellular fluid (ECF).
Reason : Increased ECF occurs due to decreased active reabsorption of $\mathrm{Na}^{+}$.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Solution
When ECF secretion decreases, renin release is stimulated which reduces $\mathrm{Na}^{+}$ excretion, which in turn increases volume of ECF. When sodium intake exceeds sodium output by the kidneys, total body sodium and extracellular fluid volume increases.