Bio 202

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

filters and purifies blood plama, makes urine

transports urine from kidney to bladder

stores urine

transports urine out of the body

cortex, medulla, renal pelvis, renal artery, ureter

glomerular capsule -> proximal convoluted tubule -> descending loop of Henle -> ascending loop of Henle -> distal convoluted tubule -> collecting duct

afferent arteriole -> glomerulus -> pertibular capillaries -> vasa recta -> renal vein

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 filtered-amount reabsorbed + amount secreted

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

renal artery -> afferent arteriole -> glomerulus -> proximal tubule -> peritubular capillaries -> renal vein

filtered and secreted

filtered and PARTIALLY reabsorbed

filtered and COMPLETELY reabsorbed