PATHOLOGY MCQ
URINARY SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The first part of the nephron tubule, it uses active transport to reabsorb sodium and chloride ions, sugars, and water from the filtrate.
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collecting duct
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proximal convoluted tubule
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renal corpuscle
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distal convoluted tubule
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Explanation:
Detailed explanation-1: -The PCT is the most metabolically active part of the nephron and uses a wide array of protein micromachines to maintain homeostasis-symporters, antiporters, and ATPase active transporters-in conjunction with diffusion, both simple and facilitated.
Detailed explanation-2: -Sodium transport across the proximal tubule is unidirectional, towards the blood, mainly because the Na+ / K+ ATPase is only to be found on the basolateral membrane but also because most of the Na+ coupled transporters which let Na+ back into the cell are found on the apical membrane.
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