Unit 3: Regulation of Urine Formation (Module 3)

isotonic

the filtrate produced in the renal corpuscle and the ISF are ___ (hypotonic/isotonic/hypertonic)

isotonic

filtrate and ISF in PCT are ______ (hypotonic/isotonic/hypertonic)

isotonic

filtrate and ISF in descending LOH are _____ (hypotonic/isotonic/hypertonic)

hypotonic

filtrate is _____ in ascending LOH and DCT (hypotonic/isotonic/hypertonic)

concentrated

if ADH is present, H2O can be reabsorbed from the DCT and the CD causing the urine to be _____

dilute

If there is no ADH, H2O can’t be reabsorbed in the DCT and CD causing urine to be ____

both solutes and water are removed

filtrate and ISF are isotonic in the PCT because…

only Na+ and Cl- are transported out of the filtrate

filtrate becomes hypotonic in the ascending LOH and DCT because…

dilute

without ADH, the DCT and CD are impermeable to H2O, making the urine ____

exercise or dehydration

concentrated urine happens during things like _____ or ______

1. secretion of ADH

2. establishment of an osmotic gradient

3. counter current flow

4. different absorption properties of LOH

what are 4 essential things that contribute to concentrated urine?

principle cells

ADH makes the ______ cells of the DCT and CD permeable to H2O

Na+ and Cl-

what ions contribute to the concentration of urine?

urea

the recycling of what contributes to the concentration of urine?