Question

Assertion: Angiotensin II increases GFR. Reason: It is a powerful vasoconstrictor.

Both the assertion and reason are true but the reason is not the correct explanation for the assertion.

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Answer

Correct Option: A
Both the assertion and reason are true, and the reason is the correct explanation for the assertion.

The Juxtaglomerular Apparatus (JGA) plays a crucial regulatory role. A decrease in glomerular blood flow, glomerular blood pressure, or Glomerular Filtration Rate (GFR) prompts the JG cells to release renin. Renin then converts angiotensinogen in the blood into angiotensin I, which is subsequently converted to angiotensin II. Due to its function as a powerful vasoconstrictor, angiotensin II increases the glomerular blood pressure and, consequently, the GFR.


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