The fall in the glorular filtration rate (GFR) or the fall in the glomerular pressure or blood flow results in secretion of renin from the JG cells.
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What is renin?
Renin is the enzymerelease by the juxtaglomerular (JG) cells of the kidney. It converts angiotensin in blood into angiotensin I, and further to angiotensin II. It helps in the regulation of the blood pressure.
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What do you understand by uricotelic animals?
Uricotelic animals are those who excrete nitorgenous wastes as as uric acid in the form of pellet or paste to minimize water loss. For examples repltiles , birds and land snails
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What is the function of angiotensin II?
Angiotensin II stimulates the adrenal cortex to secrete aldosterone hormone which stimulates the tubule cells to absorb Na+ and water from the distal part of the tubules.It is a powerful vasoconstrictor and increases the blood prssure and the GFR.