Which of the following is the function of the ADH?
A
Increases water reabsorption in proximal convoluted tubule
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B
Decreases water reabsorption in collecting duct
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C
Increase water reabsorption in collecting duct
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D
Increases diuresis
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Solution
The correct option is C Increase water reabsorption in collecting duct ADH (vasopressin) is released by the posterior pituitary lobe when the blood has high osmolarity (number of solute particles per litre of solution). It plays role in reducing blood osmolarity by increasing reabsorption of water in distal convoluted tubule (DCT) and collecting duct of the nephron. Reabsorption of water prevents diuresis (increased urine production).