Which renal hormone contributes primarily to water reabsorption?[Fill in the blank]

Question

BlackTom AI · Accepted Answer

The question asks which renal hormone contributes primarily to water reabsorption.
Option a: Aldosterone. This hormone promotes reabsorption of sodium in the distal tubule and collecting ducts, which secondarily increases water reabsorption due to osmotic effects, but its primary action is sodium handling rather than direct water absorption. So it is not the best answer for direct water reabsorption.
Option b: Antidiuretic hormone (vasopressin). Vasopressin acts on the collecting ducts to insert aquaporin-2 water channels, significantly increasing water permeability and reabsorption from the filtrate. This direct mechanism makes vasopressin the principal regulator of water reabsorption in the kidneys, especially in response to plasma osmolality and volume status.
Option c: Atrial-natriuretic peptide. ANP reduces blood volume by promoting natriuresis (sodium excretion) and diuresis; it tends to oppose water reabsorption, leading to increased urine output. Therefore, it does not contribute to water reabsorption.
Option d: Renin. Renin is part of the renin-angiotensin-aldosterone system, influencing blood pressure and sodium balance indirectly; its primary effect is to regulate angiotensin II production and aldosterone release, not direct water reabsorption. Thus, it’s not the main driver of water reabsorption.
In summary, among the listed hormones, vasopressin is the key regulator causing direct water reabsorption in the collecting ducts, aligning with the question’s focus on water handling rather than electrolyte handling alone.

Which renal hormone contributes primarily to water reabsorption?[Fill in the blank]

View Explanation

Log in for full answers

Similar Questions

The process of forming urine begins in the:

The role of the macula densa is to:[Fill in the blank]

If sodium concentration is too high in the filtrate, this implies that GFR is too and causes the of the afferent arteriole.[Fill in the blank]

The role of the macula densa is to:[Fill in the blank]

Which of the statements below DOES NOT reflect the events involved in urine formation?[Fill in the blank]

Which of the following is NOT a function of the kidney?[Fill in the blank]

Question at position 10 Which of these is the Na+ monitoring cell of the nephron?principal cellnephron loopmacula densavasa recta

Question at position 7 Increased aldosterone would cause:increased reabsorption of Na+increased permeability of the DCT to waterdecreased blood volumedecreased reabsorption of Cl-

More Practical Tools for Students Powered by AI Study Helper

Homework AI Solver

Stylized AI Paper Writer

Plagiarism Checker Assistant

Citation AI Academic Writing Tool

In-Class Translation Assistant

AI Note Generator

AI Quiz Answers

Past Exam Questions from University Test Bank

Smart Practice Assistant

Adaptive Practice

Making Your Study Simpler

Which renal hormone contributes primarily to water reabsorption?[Fill in the blank]

View Explanation

Log in for full answers

Similar Questions

The process of forming urine begins in the:

The role of the macula densa is to:[Fill in the blank]

If sodium concentration is too high in the filtrate, this implies that GFR is too ______ and causes the ______ of the afferent arteriole.[Fill in the blank]

The role of the macula densa is to:[Fill in the blank]

Which of the statements below DOES NOT reflect the events involved in urine formation?[Fill in the blank]

Which of the following is NOT a function of the kidney?[Fill in the blank]

Question at position 10 Which of these is the Na+ monitoring cell of the nephron?principal cellnephron loopmacula densavasa recta

Question at position 7 Increased aldosterone would cause:increased reabsorption of Na+increased permeability of the DCT to waterdecreased blood volumedecreased reabsorption of Cl-

More Practical Tools for Students Powered by AI Study Helper

Making Your Study Simpler

If sodium concentration is too high in the filtrate, this implies that GFR is too and causes the of the afferent arteriole.[Fill in the blank]