Explain two features which facilitate ultrafiltration
Answers
Explanation:
the resulting fluid, virtually free of large proteins and blood cells, is referred to as glomerular filtrate, or ultrafiltrate. Further modification of ultrafiltrate, by reabsorption and secretion, transforms it into urine.
Answer:
The glomerulus is a knot of cappilaries inside the Bowman's capsule. The afferent arteriole (small blood vessel leading into the glomerulus) has a much larger diameter than the efferent arteriole (small blood vessel leaving the glomerulus). This creates a build up of pressure, forcing the small molecules in the plasma like water and urea out of the glomerulus and into the Bowmans capsule via podocytes. Podocytes are cells that have 'foot-like extensions' which are wrapped around a capillary. This increases the surface area for filtration.