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Chapter 25 Urinary
| Question | Answer |
|---|---|
| where urine is formed | kidneys |
| pass urine from kidneys to bladder | ureters |
| temporary storage of bladder | urinary bladder |
| passed urine from bladder out the body | urethra |
| filter metabloc wastes, excess ions, toxins, drugs from bld. regulato water-salt balance in body. regulate acid-base balance in body (pH) | kidney functions |
| produce hormones renin and erythropoietin. synthesize vit D. gluconeogenesis during prolonged fasting. | kidney functions |
| transparent covering; protects against spread of infection in kidney | fibrous capsule |
| fatty mass providing cushioning | perirenal fat apsule |
| denset CT; secures kidneys to surrounding structures. | renal fascia |
| kidney bld supply enters at | hilum |
| functional units of kidneys. responsible for urine formation | nephrons |
| __________nephrons located in renal cortex. | cortical |
| _________ nephrons located close to cortex-medulla border | juxtamedullary |
| mostly due to hydrostatic pressure within glomerular capillaries | NFP (Net Filtration Pressure) |
| allows passage of water and small molecules, but not proteins | filtration membrane |
| volume of filtrate formed each minute by combined activity of all glomeruli of kidneys. | GFR (Glomerular Filtratin Rate) |
| cells located in walls of distal convoluted tubule and monitor filtrate NaCl conc. | Macula Densa |
| if GFR is high then filtrate flows | quickly |
| if GFR is low then filtrate flows | slowly |
| selective, transepithelial process. can be transcellular or paracellular, depending on substance | tubular reabsorption |
| __________ are lipid-insoluble, lack carriers, or too big to pass thru TJs | non-reabsorbed substances |
| tubule epithelias cells transport substances from bld(interstitial fluid) into filtrate and out of the bobdy | tubular secretion |
| _________ contains both filtered and secreted substances | filtrate |
| amt of solute particles dissolved in 1 kg of water | osmolarity |
| sets up/establishes osmatic gradient of kidneys. processes filtrate in tubules. | countercurrent multiplier |
| maintains gradients as it delivers bld to cells in medulla | countercurrent exchange |
| volume of bld plasma cleared of a given solute in a given time. | renal clearance |
| filtrate in collecting duct | urine |
| slender tubes that convey urine from kidneys to bladder. continuous with renal pelvis. | ureters |
| collapsible muscular sac; temporary storage | urinary bladder |
| 3 layers of smooth musscle. wall of urinary bladder | detrussor muscle |
| the ______ i stransitional epithelium | mucosa |
| thin-walled, muscular tube; pass urine | urethra |
| involuntary. when relaxed its closed, when contracts its open. ________ urethral sphinctor | internal |
| voluntary skepeletal muscle. _______ uretharl sphinctor | external |
| urination; voiding | mictruition |
| inhibits detrussor muscles and inhibits 8nternal sphinctor | sympathetic efferents |