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Stack #4194783

nephron

TermDefinition
glomerulus knot of capillaries which has a thin, permeable wall. afferent arteriole bringing blood into the glomerulus is wider than the efferent arteriole taking blood out of this. this narrows blood pressure in the glomerulus. ultrafiltration
Bowmans capsule double walled cup that surrounds the glomerulus. collects the glomerular filtrate and passes them along to the rest of the tubule. filtrate contains small substances
proximal convoluted tubule a section of the nephron tubule, proximal to the glomerulus, that is highly convoluted. selective reabsorption.
loop of henle reabsorption of water by osmosis passage. assists in determining the ion and water balance of the blood
distal convoluted tubule a selection of the nephron tubule, distal from the glomerulus that is highly convoluted after the loop of Henle. active secretion of unwanted items from the blood like hydrogen ions and excess urea remaining out of the blood into the tubule
collecting duct the final section of the nephron. collects all urine formed in the nephron and drains it down the renal pelvis of the kidney and out of the ureter to the bladder for excretion
ultrafiltration between the glomerulus and Bowmans capsule. thin membranes, filtration slits/gaps in membrane, high pressure due to afferent arteriole being wider than efferent. e.g. glucose, amino acids, h2o, salts, urea. blood to nephron
selective reabsorption occurs in proximal convoluted tubule. a long tubule = large SA. one cell thick + cells have microvilli = large SA. cells have many mitochondria for energy for active transport. e.g. glucose, amino acids, h20/ nephron to blood
active secretion occurs in distal convoluted tubule. long tubule = large SA. one cell thick. close to capillaries reduces diffusion distance. e.g. urea, H+, drugs. blood to nephron
Created by: Anesu8648
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