ECOLOGY
EXCRETORY PRODUCTS AND THEIR ELIMINATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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ADH and the RAAS combine at the receptor sites of proximal tubule cells, where reabsorption of essential nutrients takes place.
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Both stimulate the adrenal gland to secrete aldosterone, which increases both blood volume and pressure via its receptors in the urinary bladder.
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ADH regulates the osmolarity of the blood by altering renal reabsorption of water, and theRAAS maintains the osmolarity of the blood by stimulating Na+ and water reabsorption.
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ADH and the RAAS work antagonistically; ADH stimulates water reabsorption duringdehydration and the RAAS causes increased excretion of water when it is in excess in bodyfluids.
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Detailed explanation-1: -ADH and the RAAS work antagonistically; ADH stimulates water reabsorption during dehydration and the RAAS causes increased excretion of water when it is in excess in body fluids.
Detailed explanation-2: -ADH regulates the osmolarity of the blood by altering renal reabsorption of water, and RAAS maintains the osmolarity of the blood by stimulating Na+ reabsorption.
Detailed explanation-3: -ANF inhibits release of renin from the JGA and thereby inhibits NaCl reabsorption by the collecting duct and reduces aldosterone release from the adrenal gland. Thus ADH, RAAS, and ANF regulate the functions of kidneys and control body fluid osmolarity, salt concentration, blood pressure and blood volume.
Detailed explanation-4: -The renin-angiotensin-aldosterone system is primarily associated with blood pressure regulation by modulating blood volume, sodium reabsorption, potassium secretion, water reabsorption, and vascular tone. Other described functions of the RAAS include inflammation, apoptosis, and fibrosis.