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3. Is there any other factor besides the nephron which control the reabsorption water and certain...


3. Is there any other factor besides the nephron which control the reabsorption water and certain molecules for osmoregulation? Substantiate your answer with reasons?

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Answer #1

Anti diuretic hormone

It is a hormone secreted by the posterior pituitary gland.It is secreted as a result of negative feedback mechanism due to low water content in the body.

It stimulates water reabsorption by stimulating insertion if water channels into the membranes of kidney tubules.These channels transport soluble free water through tubular cells and back into blood leading to a decrease in plasma osmolarity and increased osmolarity of urine

Eg

You are walking in a desert and the sun in making you sweat a lot and this decreases water concentration.loss of water causes concentration of blood solutes and therefore Plasma osmolarity increases triggering the osmoreceptors of the hypothalamus and secreting adh

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