Biology Homeostasis PMDC Conceptual Practice
PMDC Verified Question 12 of 99
Urine formation in human nephrons is the cumulative result of which three processes?
A
Ultrafiltration only
B
Ultrafiltration, tubular reabsorption, and tubular secretion
C
Tubular secretion and active transport only
D
Passive diffusion and osmosis only
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option B: Ultrafiltration, tubular reabsorption, and tubular secretion
Concept: Steps in urine formation.

Solution: Renal urine production requires ultrafiltration at the glomerulus, selective tubular reabsorption along the nephron tubules, and active tubular secretion of wastes into the lumen.

Why other options are incorrect:
  • Option A, Option C & Option D: These options list single or incomplete isolated processes involved in nephron function.

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