QuestionSBA
QuestionChoice
Desmopressin is a synthetic version of vasopressin, used to treat conditions such as cranial diabetes insipidus and nocturnal enuresis. It regulates water reabsorption in the DCT and collecting duct, by increasing the insertion of aquaporin-2 receptors into the DCT and collecting duct cells. This in turn leads to the reabsorption of water back into the bloodstream. Although this can indirectly influence sodium levels through dilutional effects, vasopressin does not work directly on sodium transporters.
10007039
d
Desmopressin
QuestionChoice
Renin cleaves angiotensinogen to form angiotensin I. This, if subsequently converted to Angiotensin II, causes the release of aldosterone from the adrenal cortex. Thus although renin increases the expression of aldosterone, which subsequently regulates sodium reabsorption, it does not directly lead to sodium reabsorption in the DCT.
10007038
c
Renin
QuestionChoice
Vasopressin, also known as antidiuretic hormone or ADH, is a hormone secreted by the pituitary gland. It regulates water reabsorption in the DCT and collecting duct, by increasing the insertion of aquaporin-2 receptors into the DCT and collecting duct cells. This in turn leads to the reabsorption of water back into the bloodstream. Although this can indirectly influence sodium levels through dilutional effects, vasopressin does not work directly on sodium transporters.
10007037
b
Vasopressin
QuestionChoice
Prostacyclin is a vasodilator and platelet activation inhibitor, unrelated to sodium reabsorption.
10007040
e
Prostacyclin
QuestionChoice
Aldosterone is a mineralocorticoid hormone produced by the adrenal cortex. It plays a key role in maintaining fluid balance, primarily through its role in regulating sodium reabsorption. In the distal convoluted tubule, aldosterone upregulates the expression of sodium chloride co-transporters (NCC). These increase the reabsorption of both sodium and chloride.
10007036
a
Aldosterone
Concept
Chapter
2693
4562
Microcirculation and Tissue Fluid Exchange
Topic
193
Haematological Science
13954
The kidneys play a vital role in maintaining the balance of fluid and electrolytes.

Which of the following hormones directly regulates sodium reabsorption in the distal convoluted tubule (DCT)?
a