Medical MCQ-Which of the following is the mode of action of vasopressin?

Which of the following is the mode of action of vasopressin?

Facilitates water absorption at medullary ducts

Increasing permeability of H2O across collecting duct

Facilitate water absorption at PCT

Facilitate H2O secretion at loop of henle

Question Category:

Physiology

Correct Answer:

Increasing permeability of H2O across collecting duct

Description:

The action of vasopressin is increasing the permeability of collecting duct to water Aquaporin 2. The net effect is water retention in excess solute resulting in decreased effective osmotic pressure of body fluids. Ref: Ganong, 21st Edition, Page 235

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