selective reabsorption Flashcards
1
Q
define selective reabsorption
where does most of this occur?
A
the reabsorption of useful products from glomerular filtrate by the nephron.
selective reabsorption mostly occurs in the PCT. Some occurs in the Loop of Henle, DCT and collecting duct
2
Q
how is glomerular filtrate produced
A
ultrafiltration
3
Q
how is the PCT adapted for reabsorbtion?
A
the PCT has microvilli which create a large SA
4
Q
contents of urine
A
water, urea, excess vitamins, ions
5
Q
by what processes are the different contents of urine reabsorbed by the nephron?
A
FACILITATED DIFFUSION absorbs some amino acids and glucose
ACTIVE TRANSPORT absorbs some glucose, amino acids and ions such as Na+
OSMOSIS reabsorbs water
SIMPLE DIFFUSION reabsorbs urea
