Which of the following rightly describes the mechanism of "Vasopressin Escape" in SIADH?
ACharacterized by sudden decrease in urine volume with increase in urine osmolality independent of circulating vasopressin levels.
BCharacterized by sudden increase in urine volume with decrease in urine osmolality independent of circulating vasopressin levels.
CCharacterized by sudden decrease in urine volume with increase in urine osmolality dependent on circulating vasopressin levels.
DCharacterized by sudden increase in urine volume with decrease in urine osmolality dependent on circulating vasopressin levels.
Vasopressin acts through which aquaporin channels in the collecting duct?
AAquaporin 1
BAquaporin 2
CAquaporin 4
DAquaporin 3
Which of the following is the primary mechanism that drives sodium reabsorption in the proximal tubule?
ASodium reabsorption through cotransport with amino acids at the luminal membrane.
BSodium reabsorption through cotransport with glucose at the luminal membrane.
CSodium reabsorption through countertransport with hydrogen ions at the luminal membrane.
DActive sodium transport via the Na+-K+-ATPase pump at the basolateral membrane.
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