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urinary 5

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QuestionAnswer
ADH (vasopressin) released by posterior pituitary when osmolality inc.; inserts aquaporins in collecting duct, inc water absorption dec urine vol
aldosterone released from adrenal cortex inc sodium absorption, potassium secretion, water follows sodium
angiotensin II vasoconstriction inc BP; stimulates aldosterone and ADH; dec filtrate production at high levels
ANP opposes RAAS
PTH parathyroid hormone, inc ca reabsorption and phosphate excretion in DCT; stimulates cortisol
erythropoietin released by kidneys when O2 is too low; stimulates RBC production in red bone marrow
GFR= 125 ml per minute/ 180 L filtrate daily/ 1.5 L excreted in urine
kidneys are located retroperitoneal between T12 and L3; right kidney slightly lower
nepheron= renal corpuscle (glomerulus and Bowmans capsule) and renal tubule
filtration membrane has 3 layers called fenestrated endothelium, basement membrane, podocytes
PCT reabsorbs 65% of NA/water, 100% glucose and ALL amino acids
juxtamedullary nephrons- have long loops of Henle- critical for concentrating urine
RAAS- dec BP --> renin-->angiotensin I--> ACE--> angiotensin II--> aldosterone--> BP increases
ADH inserts aquaporin- 2 channels in collecting duct principal cells
external urethral sphincter= skeletal muscle, voluntary; internal= smooth, involuntary
proteinuria indicates damage to glomerular filtration membrane
what hormone inc water reabsorption in collecting duct by inserting aquaporin channels ADH (vasopressin)
Created by: b.marshall
 

 



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