The yellow colour of normal urine is due to
Correct answer: C. the pigment urochrome
- A. haemoglobin
- B. melanin
- C. the pigment urochrome
- D. chlorophyll breakdown
Explanation
Urochrome, derived from the breakdown of haemoglobin, tints urine in proportion to concentration. Darker urine simply means more pigment per volume of water, a built in hydration meter.
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About Kidney and Urinary System
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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