Asked in FBISE Biology 2022 SLO — Paper 1 2022Moderate

Antidiuretic hormone promotes the retention of water by stimulating the

Correct answer: D. Permeability of collecting duct to water

  • A. Active transport of water
  • B. Active transport of chloride
  • C. Active transport of sodium
  • D. Permeability of collecting duct to water

Explanation

When ADH makes it to your kidneys, it signals them to conserve water and produce more concentrated urine. The water your body retains has effects on your body, including: Diluting your blood. Lowering your blood's osmolality‌. The collecting duct system is under the control of antidiuretic hormone (ADH). When ADH is present, the collecting duct becomes permeable to water.

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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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