Water Control A2 Flashcards
1
Q
process of ultrafiltration
A
high hydrostatic pressure
water, glucose, ions and urea exit
through small pores in endothelium
and through basement membrane
2
Q
how does the volume of urine increase
A
water potential of filtrate/tubule decreases
less water reabsorbed
collecting duct is where osmosis occurs
3
Q
what is reabsorbed by proximal convoluted tubule
A
glucose and water
4
Q
how is glucose and water reabsorbed
A
glucose by facilitated diffusion and active transport
water down water potential gradient
5
Q
what does thicker medulla cause
A
more concentrated urine and longer loop
6
Q
what does a longer loop of Henle cause
A
increase in sodium ion concentration in medulla
so water potential gradient maintained for longer
more water reabsorbed from loop and collecting duct
