Regulation of aldosterone secretion by the renin-angiotensin-aldosterone (RAA) p
ID: 3515283 • Letter: R
Question
Regulation of aldosterone secretion by the renin-angiotensin-aldosterone (RAA) pathway. Aldosterone helps regulate blood volume, blood pressure, and levels of Nat, K7, and H+ in the blood. Dehydration, Na deficiency, or hemorrhage 2 Decrease in blood volume 14 Blood pressure increases until t returns to normal 4 3 Decrease in blood pressure Juxtaglomerular cells of kidneys 15 13 Vasoconstriction of arterioles Increased blood volume 5 Increased renin Adrenal cortex Angiotensinogen Increased K in extracellular fluid 8 7 Increased angiotensin I In kidneys, increased Na and water reabsorption and increased secretion of K and Ht into urine CE 12 Increased angiotensin II Increased aldosterone Lungs (ACE = Angiotensin Converting Enzyme)Explanation / Answer
Yes, they are valuable to human body but at the stage of low blood pressure or dehydration or Na+ deficiency, the osmolarity of cell get disturbed. So for maintaining cellular osmolarity renal functions secrets excessive K+ & H+ ions. And further respiratory and renal function maintain the pH of blood.