In a kidney tubule, which substances are filtered out of the blood in the glomerulus?
Correct answer: C. Glucose, salts, urea and water
- A. Glucose, protein, salts and water
- B. Glucose, protein, urea and water
- C. Glucose, salts, urea and water
- D. Protein, salts, urea and water
Explanation
Glomerular filtration lets through small molecules, so glucose, salts, urea and water all enter the filtrate. Plasma proteins are too large to cross the filtration membrane, so every option containing protein is wrong, and protein in urine is a sign of kidney damage.
This question appeared on the UHS MDCAT 2026 paper, which you can sit online with every answer explained.
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The kidney and urinary system remove nitrogenous wastes, regulate water and ion balance, and help maintain blood pH through filtration, selective reabsorption and secretion. Questions cover nephron structure, ultrafiltration, the loop of Henle, collecting ducts, urine formation and the roles of ADH and aldosterone, while distinguishing excretion from egestion.
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