10) Facultative reabsorption of water occurs mainly in the A) glomerulus B) prox
ID: 3512022 • Letter: 1
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10) Facultative reabsorption of water occurs mainly in the A) glomerulus B) proximal convoluted tubule. C) descending limb of the loop of Henle. D) ascending limb of the loop of Henle. E) collecting ducts. 11) Sodium ion transporters in the proximal convoluted tubule promote the reabsorption of ALL of the following EXCEPT A) ammonium ions. B) bicarbonate ions C) chloride ions. D) glucose. E) amino acids. 12) Which of the following is TRUE about tubular fluid that has just reached the distal convoluted tubule? A) It has a relatively high osmolarity because ions have been added to the fluid, while water has been reabsorbed. B) It is identical to glomerular filtrate because nothing has been reabsorbed yet. C) It has a relatively low osmolarity because it has just left the ascending limb of the loop of Henle where ions were reabsorbed by water was not E) Both A and D are correct. 13) The amount of potassium secreted by principal cells is increased by which of the following? A) high levels of sodium ions in tubular fluid B) low levels of potassium in plasma C) the action of mesangial cells D) increased ADH E) Both A and D are correct 14) A role of intercalated cells is to: A) secrete renin. B) secrete erythropoietin. C) reabsorb water in response to ADH D) reabsorb sodium ions in response to aldosterone. E)excrete hydrogen ions when pH is too lowExplanation / Answer
10. E) Facultative reabsortion of water occurs mainly in the collecting ducts, the collecting ducts are supported by a small amount of connective tissue, containing blood vessels, nerves and lymph vessels.
11. A) Sodium ion transport in the proximal convoluted tubule promote the reabsortion of all the ions except ammonium ions.
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