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15 Cards in this Set

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Kidney functions
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
Kidney
filters and purifies blood plama, makes urine
ureter
transports urine from kidney to bladder
bladder
stores urine
urethra
transports urine out of the body
Layers of kidney
cortex, medulla, renal pelvis, renal artery, ureter
Tubular components of a nephron
glomerular capsule -> proximal convoluted tubule -> descending loop of Henle -> ascending loop of Henle -> distal convoluted tubule -> collecting duct
vascular components of a nephron
afferent arteriole -> glomerulus -> pertibular capillaries -> vasa recta -> renal vein
Processes in the nephron
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
Amount excreted = ?
amount filtered-amount reabsorbed + amount secreted
why is so much blood filtered, but so little urine is produced?
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
correct path of a glucose molecule that is filtered and reabsorbed by a nephron
renal artery -> afferent arteriole -> glomerulus -> proximal tubule -> peritubular capillaries -> renal vein
toxins
filtered and secreted
salts (NaCl)
filtered and PARTIALLY reabsorbed
glucose/ amino acids
filtered and COMPLETELY reabsorbed