PATHOLOGY MCQ
URINARY SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The juxtaglomerular apparatus ____
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Helps reabsorb water from the collecting ducts
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Adjusts blood flow into the vasa recta
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Produces a concentrated urine
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Monitors blood sodium concentration and adjusts glomerular filtration volume
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Explanation:
Detailed explanation-1: -Macula densa cells in the distal nephron, according to the classic paradigm, are salt sensors that generate paracrine chemical signals in the juxtaglomerular apparatus to control vital kidney functions, including renal blood flow, glomerular filtration, and renin release.
Detailed explanation-2: -Juxtaglomerular cells secrete renin in response to macula densa cells, in case of high blood pressure. Renin then activates the RAAS pathway in which angiotensin II stimulates the secretion of aldosterone from the adrenal glands.
There is 1 question to complete.