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26 Cards in this Set
- Front
- Back
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d: renal lobe
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medullary pyramid and overlying cortex
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d: renal lobule
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ray with surrounding cortical tissue.
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d: medullary ray
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bundles of collecting ducts and bv's
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What consists of a nephron
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renal corpusucle/bowman's, glomerulus, prox tubule, loop, distal tubule.
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what is a uriniferous tubule
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nepron and collecting tubule. func to form urine.
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whats the difference btw secretion and resorption
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tissue to tubule, tubule into tissue.
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role of podocyte
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wrap around single layer of endothelial cells of glomerular capillaries
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describe the filtration barrier. types of cells? characteristics?
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1. capillary endothelium (fen) 2. BM shared btw endo and podocyts. 3. podocyte filtration slits. 4. mesengial cell: endocytose material that passes fen endo cells.
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epithelium of prox tubule
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cuboidal to low columnar. microvilli BB. numerous infoldings and mito.
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epithelium of thick des loop?
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simple cuboidal to low columnar.
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epithelium of thick ascending loop
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same as distal tubule
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thin loop of henle epithelium?
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simple squamose epi
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describe func of regions on nephron. Prox
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prox: 65% NaCl, H20, 100% AA, sugars, little protein.
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func of loop on henle
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gen: primary func trans NaCl from tubule to medulla.
thin: s. sq. concentration of urine. des: perm to H2) but imperm NaCl so H20 leaves tubule. ascend: imperm H20 NaCl leaves tubule. |
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func of distal tubule
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cuboidal no BB, contain mito. Na+/K+ ATPase Na+ transport. Func is to reabsorb NaCl form tubule. also bicarbonate, excretion of ammonia.
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role and function of JG cells
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secrete renin, baroreceptor for BP drop in kidney.
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role and function of macula densa
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osmoreceptor for changees in Na+ concentration. sends signal to JG cells to secrete renin.
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characteristics and func of mesengeal cells.
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phagocytic, porstaglandins and cytokines, contract and regualte Blood flow.
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describe role of renin concerning angiotensinogen.
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angiotensinogen (renin)=>angiotensin I (angiotensin convert enz) => angiotensin II => is a vasopressor and contraction of SM. also stim increase aldosterone which will increase Na+ reabsorp and increase BV and BP.
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func of collecting duct
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To reabsorb Na+ in exchange for K+.
To excrete urea. To secrete H+ to acidify the urine. To reabsorb water. |
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whats the effect of ADH on the collecting duct?
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perm of epi cells of water is increased.
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d: vasa rectae
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extend deep into the medulla and essen to maintain osmotic gradient.
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extrarenal collecting system.
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transitional epi which is imperm to salt and water. male : trans becomes pseudo strat female: trans becomes stratified sq.
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flow of ultrafiltrate in nephron
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prox to thick desceing limb to ascending limb to distal con to collecting tubule to collecting duct to duct of bellini.
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what cells make up the filtration apparatus
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podocyte and endothelial cell. fenestrated prevents blood but allows plasma components.
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effects of angiotensin II
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stim: aldosterone, vasocontriction, ADH, reabsorption of NaCl in prox. reabsorp of naCl in thick ascending loop.
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