Aldosterone plays role in:
Correct answer: B. Uptake of sodium in loop of Henle
- A. Transport of water
- B. Uptake of sodium in loop of Henle
- C. Transport of K* ions inta kidney
- D. Reabsorption of water
Explanation
Explanation:Aldosterone is a hormone that is involved in osmoregulation and blood pressure regulation. It is secreted by the adrenal cortex and functions as an uptake of sodium in the loop of Henle. This option is incorrect because aldosterone is involved in regulating fluid and electrolyte balance in the body, it does not directly transport water. This option is also incorrect because aldosterone promotes the secretion of potassium ions into the urine, rather than their uptake into the kidney. This option is partially correct, as aldosterone does promote the reabsorption of water in the kidney, but this is primarily a result of its actions on sodium uptake.
This question appeared on the UHS MDCAT 2009 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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