Which substance is normally retained in the blood rather than filtered freely through the glomerular filtration barrier?
Correct answer: C. Large plasma proteins
- A. Sodium ions
- B. Water molecules
- C. Large plasma proteins
- D. Small glucose molecules
Explanation
The filtration barrier normally prevents most large plasma proteins from entering the filtrate. Water, sodium and glucose are small enough to pass into the filtrate and are later selectively handled by the tubules.
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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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