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Question

Anti Diuretic Hormone(ADH) acts on the


A
Collecting tubule of kidney
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B
Loop of Henle
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C
Collecting ducts of testes
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D
None of the above
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Solution

The correct option is A Collecting tubule of kidney
Osmoreceptors in the body are activated by changes in blood volume, body fluid volume and ionic concentration. An excessive loss of fluid from the body can activate these receptors, which stimulate the hypothalamus to release antidiuretic hormone (ADH) or vasopressin from the neurohypophysis. ADH facilitates water reabsorption from latter parts of the tubule (Distal convoluted tubule and Collecting duct), thereby preventing diuresis. An increase in body fluid volume can switch off the osmoreceptors and suppress the ADH release to complete the feedback. ADH mainly acts on collecting ducts of kidney and increase the water reabsorption in this part.

Biology

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