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urinary system 2

QuestionAnswer
male urethra 20cm, 3 segments, (prostatic, membranous, spongy)
female urethra 3-4 cm, urinary only
nephrons microscopic units of kidneys
renal corpuscle bowman capsule and glomerulus
bowman capsule (glomerular) cup shaped top of nephron
glomerulus network of blood capillaries tucked in bowman capsule
renal tubule Proximal convoluted tubule (PCT), Nephron loop (Henle loop), Distal convoluted tubule (DCT), Collecting duct (CD)
Proximal convoluted tubule (PCT) First segment of a renal tubule
Nephron loop (Henle loop) Extension of proximal tubule; consists of straight descending limb, hairpin turn, and straight ascending limb
Distal convoluted tubule (DCT) Part of tubal distal to ascending limb of nephron loop
Collecting duct (CD) Straight part of a renal tubule
kidney function Excretes toxins and nitrogenous wastes Regulates levels of many chemicals in blood Maintains water balance Helps regulate blood pressure via secretion of renin Secretes erythropoietin (EPO)
renal papilla apex of pyramid
processes of urine formation glomerular formation, tubular reabsorption, tubular secretion
glomerular formation BP forces water and small solutes from glomerular capillaries into Bowmans space
what passes filtration membrane water, glucose, amino acids, urea, ions, drugs
what can't pass thru filtration membrane plasma proteins (albumin), blood cells (size and charge barrier)
tubular reabsorption 99% of filtrate is returned to blood, substances move form tubule lumen to peritubular capillaries/ vasa recta
Created by: b.marshall
 

 



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