Renin-Angiotensin-Aldosterone
Pathway
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less ANGIOTENSIN II is made
K+ not secreted from blood to urine
less K+ in urine
Adrenal cortex secretes less ALDOSTERONE
Na+/K+ ATPase not turned on
more K+ in blood
less Na+ reabsorbed from urine into blood
less water reabsorbed
blood volume not increased
blood pressure not increased
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A man has taken an ACE inhibitor, which will decrease his production of angiotensin II and aldosterone. His urine potassium levels will decrease and his blood potassium levels will increase. His blood pressure will decrease. He might develop hyperkalemia leading to cardiac arrest, and his adaptive response to the hyperkalemia could cause metabolic acidosis. This is the end of the patho problem example. You should also be able to use this flow chart to explain the consequences of: Renal stenosis Hyperaldosteronism and hypoaldosteronism renin-secreting tumors |
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