Multiple Choice
In the context of fluid balance, a person who has a low blood volume is said to be:
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26. Fluid and Electrolyte Balance, Acid Base Balance
Fluid Balance
Multiple Choice
In the context of fluid balance, which hormone primarily promotes water retention in the kidneys by increasing water reabsorption in the collecting ducts?
A
Atrial natriuretic peptide (ANP)
B
Aldosterone
C
Antidiuretic hormone (ADH, vasopressin)
D
Parathyroid hormone (PTH)
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Verified step by step guidance1
Understand the role of each hormone listed in the problem in relation to kidney function and fluid balance.
Recall that Atrial natriuretic peptide (ANP) primarily promotes sodium and water excretion, leading to decreased blood volume and pressure.
Recognize that Aldosterone increases sodium reabsorption in the distal tubules and collecting ducts, which indirectly promotes water retention but mainly by sodium retention.
Identify that Parathyroid hormone (PTH) mainly regulates calcium and phosphate balance, not water reabsorption in the kidneys.
Focus on Antidiuretic hormone (ADH, vasopressin), which directly increases water permeability in the collecting ducts, promoting water reabsorption and thus water retention.
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