Normally the process which exerts the greatest control over the water balance of an individual is:
Correct answer: B. Kidney function
- A. Sweating
- B. Kidney function
- C. Evaporation through the skin
- D. Respiratory loss
Explanation
Option b is correct. Kidneys play a central role in regulating water balance through processes like filtration, reabsorption, and excretion. They are responsible for maintaining the proper concentration of solutes in the blood and adjusting urine production based on the body's hydration status. This makes kidney function the primary regulator of water balance in most individuals.
This question appeared on the KMU Centralized Admission Test 2022 paper, which you can sit online with every answer explained.
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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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