describe ultrafiltration in the Bowman's capsule and the composition of the glomerular filtrate.
-nephron of the kidney- structure which carries out the filtration of the blood.
-results in filtered blood (clean blood) with waste products removed (urine)
-urine composed of water (the majority) salts and urea (molecule which contains nitrogen waste from body- toxic)
-urine comes out into the pelvic region and drains into the bladder.
-urine is produced at the beginning of the nephron called bowman's capsule (filtration process begins) known as ultra filtration.
-the filtration of blood begins with the blood arriving in the kidney in the nephron in the blood vessel called the afferent arteriole- the blood is coming in (high pressure blood from artery) (wide blood vessel)
-the twisted and coiled bit is called the glomerulus.
-the blood vessel that comes out of the bowman's capsule the diameter is smaller. (narrow blood vessel)
-the blood pressure increases in the glomerulus. the consequences is that the high pressure forces the liquid within the blood (plasma-component which dissolves in blood eg. water as solvent, salts, glucose, amino acids, urea.)- these things are all forced out of the blood vessel and into the space- inside of the bowman's capsule.
-when the plasma is forced inside the bowman's capsule we change the name to filtrate. and because it is in the glamourous we call it the glomerula filtrate instead- contains water, salts, amino acids, glucose and urea.
-blood has been filtered by pressure due to the smaller restricted diameter of the blood vessel, generating a high pressure which forces the liquid to the tube.
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