A&P2 Test 5 #6 Urinary System-C-V-& JGA
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| PARITUBULAR CAPILLARIES are a: | network of capillaries
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| Peritubular capillaries are formed: | from the division of the efferent arteriole to a cortical nephron
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| Peritubular capillaries usually rejoin | to form the interlobular veins
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| VASA RECTA are specialized branches: | of the peritubular capillaries in the medullary region
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| Vains are divided like arteries but: | more or less in reverse
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| RENAL VEIN joins the: | INFERIOR VENA CAVA in the abdominal cavity
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| MACULA DENSA (MD) is assoc: | w/DCT
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| Macula Densa contains: | CHEMORECEPTORS & OSMORECEPTORS
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| Chemoreceptors & Osmoreceptors: | respond to solute concentrations of filtrate
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| Macula Densa-describe | tall, closely packes tubulel
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| Macula Densa-located: | point where LOH & DCT meet
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| MD cells adjascent to: | JG cells, which are part of wall of afferent arteriole
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| JG aka | JUSTAGLOMERULAR CELLS
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| JG CELLS are large, smooth: | muscle cells w/prom. secretory granules containing renin
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| JG cells are modified smooth M. cells from: | tunica media of the afferent arteriole that meet cells of the DCT
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| JG cells detect: | BP changes in afferent arteriole
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| JGA is the: | JUSTAGLOMERULAR APPARATUS
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| The JG system helps | regulate renal BP
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| When arterial BP falls | JG cells release renin into blood
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| RENIN triggers a series of | enzymatic reactions
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| Enzymatic reactions caused by renin make: | ANGIOTENSIN 1
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| ANGIOTENSIN 1 is converted to: | ANGIOTENSIN II by ACE
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| ACE is | ANGIOTENSIN CONVERTING ENZYMES in the lungs & plasma
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| Angiotensin II is a potent: | vaso contrrictor & also stimulates thirst center in hypothalmus
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| Renin also stimulates the: | adrenal cortex to produce aldosterone
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| ALDOSTERONE enhances renal: | re absorption of NA+ & encourages posterior pituitary to release ADH
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| ADH increases | water retention
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| Increasing water retention means: | that ADH helps increase blood volume & BP
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| These 3 work to increase BP & Volumn: | aldosterone, angiotensin II, & ADH
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| ANP is | atrial natriuretin peptide
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| ANP provides homeostatic: | regulation of this sys by lowering BP
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| ANP causes dilation of the: | arrerent arteriole & constriction of the efferent arteriole
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| The dilation & constriction of ANP: | increases GFR and ultimately increases uring prod.
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| Loop of Henley-has | ASCENDING & DESCENDING sections
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