Term
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Definition
| form urine, primary blood (plasma) filter |
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Term
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Definition
| Transport urine from kidneys to bladder |
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Term
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Definition
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Term
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Definition
| excrete urine from bladder to outside of body |
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Term
| 6 functions of urinary system |
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Definition
1. regulate plasma ionic composition
2. regulate plasma volume
3. regulate plasma osmolarity
4. regulate plasma pH
5. removes metabloic waste and foreign substances from plasma
6. hormone secretion |
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Term
| Hormones secreted in urin |
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Definition
erythropoetin- increases red blood cell production
renin role in aldosterone production |
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Term
| Kidneys receive % of cardiac output at rest |
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Definition
| 20%, large flow of blood, less than 1% of body weight, utilize 16% of ATP usage by body. |
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Term
| Blood supply to kidneys via |
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Definition
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Term
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Definition
microscopic functional unit of the kidney
1 million/ kidney |
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Term
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Definition
1. renal corpuscle
-glomerulus
-bowmans capsule
2. renal tubule- long tube divided into several specialized regions |
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Term
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Definition
found in renal corpuscle, twisted ball of blood capillaries.
plasma is filtered from blood and enters into tubule system.
Enters from afferent arterioles, leaves thru efferent arterioles which form peritubular capillaries. |
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Term
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Definition
| inflow end of renal tubule |
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Term
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Definition
| proximal convoluted tubule, loop of henle, distal convoluted tubule, collecting duct |
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Term
| Basic process in forming urine |
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Definition
1. glomerular filtration
2. reabsorption
3. secretion
4. excretion |
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Term
| first process of urine forming- glomerular filtration |
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Definition
| plasma filtered from glomerulus into bowmans capsule |
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Term
| 2. reabsorption in forming urine |
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Definition
| movement of substances from tubules back into blood |
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Term
| 3. urine forming step of secretion- |
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Definition
| movement of substances from peritubular capillaries directly into tubules |
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Term
| 4. urine forming step of excretion |
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Definition
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Term
| filtrate of the kidneys is similar to |
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Definition
| plasma, minus the plasma proteins |
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Term
| % plasma passing through each kidney is filtered |
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Definition
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Term
| Glomerular Filtration (GFR) |
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Definition
| rate of filtration = 125 mL/min or 180L/day |
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Term
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Definition
| small increase in GFR= large increase in fluid filtered and excreted. |
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Term
Liters of urine excrited/ day
% fluid filtered and reabsorbed |
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Definition
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Term
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Definition
| blood pressure (primary) and osmotic force of plasma (due to proteins) |
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Term
| Increase Blood pressure-- filtration |
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Definition
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Term
| increased blood pressure is do to dilating which is controled by |
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Definition
| afferent arteriole, tubuloglomerular feedback |
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Term
| tubuloglomerular feedback |
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Definition
decrease in kidney fluid- dilates afferent arterioles to increase BP and increase GFR (filters more fluid)
if increased fluid is in tubules, arterioles are constricted and decreased GFR (less fluid filtered) |
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Term
| sympathetic control of GFR |
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Definition
| increased stimulation causes constriction in afferent arterioles reducing blood flow which decreases fluid filtered (GFR) this conserves fluid in plasma to increase blood volume. |
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