Which process moves selected substances, such as hydrogen ions and potassium, from peritubular blood into the tubular fluid?
Correct answer: C. Tubular secretion
- A. Glomerular filtration
- B. Tubular reabsorption
- C. Tubular secretion
- D. Urinary elimination
Explanation
Tubular secretion transfers selected substances from the blood into the nephron lumen for removal in urine. Reabsorption moves substances in the opposite direction, from tubular fluid back into the blood.
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About Urinary System
The urinary system includes the kidneys, ureters, urinary bladder and urethra, with emphasis on nephron structure and urine formation. It explains glomerular filtration, tubular reabsorption, tubular secretion, water and electrolyte regulation, acid base balance, and the roles of ADH and aldosterone in maintaining homeostasis.
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