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6 Cards in this Set
- Front
- Back
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What instigates the RAA system?
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Low BP sensed by the JG cells in the kidneys
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What are the 3 steps between the sensing of low BP by the JG cells and Angiotensin II?
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Kidneys release Renin
Renin converts Angiotensinogen to Angiotensin I ACE from the lungs converts Angiotensin I to Angiotensin II |
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What is the result in the vessels from increased ATII?
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Vasoconstriction, increase in BP
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What is the result in the kidneys from increased ATII?
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Constricts efferent arteriole of glomerulus, preserves renal function in low volume states
Increases Proximal tubule Na/H activity, causing Na/HCO3/H20 reabsorption |
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What does the adrenal gland do from the increased ATII?
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Creates a favorable Na gradient for Na and H20 resorption
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How do the Hypothalamus and Posterior Pituitary respond to the increased ATII?
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PP - Increases H20 channel insertion in principal cells = increased H20 reabsorption
Hypothalamus - Stimulated, increases thirst |
