Loop Of Henle And Urine Conc Flashcards
1
Q
What is the thin ascending , thin descending and thick ascending limbs permeable and not permeable to?
A
Thin descending- permeable to water and impermeable to sodium and chlorine
Thin ascending - permeable to sodium and chlorine and impermeable to water
Thick - permeable to sodium chlorine bicarbonate calcium and potassium and impermeable to water
2
Q
What type of diffusion does cations go through?
A
Para cellular diffusion
3
Q
What is countercurrent multiplication?
A
Medullary interstitial fluid is hyperosmotic so CM maintains flow of solutes and water in and out of the medulla to produce high medullary osmolality
4
Q
Define osmotic pressure
A
The pressure applied by a solution to prevent the flow of water across a semipermeable membrane
