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15 Cards in this Set
- Front
- Back
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Kidney functions
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1. regulation of ECF volume and blood pressure
2. regulation of osmolarity 3. regulation of the concentration of ions in ECF (NA, K, H) 4. excretion of wastes 5. production of hormones |
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Kidney
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filters and purifies blood plama, makes urine
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ureter
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transports urine from kidney to bladder
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bladder
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stores urine
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urethra
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transports urine out of the body
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Layers of kidney
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cortex, medulla, renal pelvis, renal artery, ureter
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Tubular components of a nephron
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glomerular capsule -> proximal convoluted tubule -> descending loop of Henle -> ascending loop of Henle -> distal convoluted tubule -> collecting duct
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vascular components of a nephron
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afferent arteriole -> glomerulus -> pertibular capillaries -> vasa recta -> renal vein
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Processes in the nephron
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1. filtration at glomerulus (no protien)
2. reabsorption: reabsorbed material is taken up by capillaries and returned to the circulation 3. secretion of toxins and H+ in the proximal tubule, distal tubule and collecting duct |
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Amount excreted = ?
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amount filtered-amount reabsorbed + amount secreted
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why is so much blood filtered, but so little urine is produced?
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1.access to blood helps kidneys do everything they have to
2. kidneys cant just secrete toxins and wastes because they'll become vunerable to novel toxins: if everything is filtered, and what needs to be reabsorbed is reabsorbed, novel toxins will be lost in urine |
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correct path of a glucose molecule that is filtered and reabsorbed by a nephron
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renal artery -> afferent arteriole -> glomerulus -> proximal tubule -> peritubular capillaries -> renal vein
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toxins
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filtered and secreted
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salts (NaCl)
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filtered and PARTIALLY reabsorbed
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glucose/ amino acids
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filtered and COMPLETELY reabsorbed
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