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Asked in FBISE Biology 2022 SLO — Paper 1 2022

Antidiuretic hormone promotes the retention of water by action on

Correct answer: D. X: Distal tubules Y: Loop of Henle

  • A. X: Efferent arterioles, Y: Proximal convoluted tubule
  • B. X: Afferent arterioles, Y:Proximal convoluted tubule
  • C. X: Efferent arterioles, Y: Loop of Henle
  • D. X: Distal tubules Y: Loop of Henle

Explanation

ADH released from the posterior pituitary lobe acts to actively transport water from filtrate in Distal tubules and collecting tubules back to the kidney.

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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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