specialised process which results in formation of tissue fluid in capillary beds, due to structure of Bowman's capsule
glomerulus supplied with blood by wide afferent arteriole from renal artery
what is the afferent arteriole
blood moving into the kidney from the renal artery
what is the efferent arteriole
blood leading away from the kidney
the efferent is narrower than afferent, so hydrostatic pressure builds, so glucose, water, mineral ions and other waste products are forced out of the blood
the molecules forced out form the glomerulus filtrate
proteins and blood cells are too large to pass out of the blood, so remain
the fluid then passes through basement membrane, which acts like another seive
most plasma contents can pas through basement membrane, except blood cells and proteins due to size
what is basement membrane made up of
network of collagen fibres and other proteins
the filtrate that enters the capsule is isotonic to blood plasma
the volume of blood that is filtered in a given time is the glomerular filtration rate
