Collecting duct system and fluid balance Flashcards
1
Q
What does each Collecting Duct System deliver?
A
delivers its filtrate to a system of collecting ducts
2
Q
Where does it pass by?
A
by the medullary interstitial which has a high sodium concentration
3
Q
What does ADH/vasopressin act on?
A
the membrane of the collecting ducts of nephron.
4
Q
What does vasopressin acting on the membrane of collecting ducts increase?
A
the permeability of the ducts to water, so that more water is reabsorbed into the bloodstream.
5
Q
What can an increase of ADH/vasopressin be an indication of?
A
dehydration
6
Q
What happens in the absence of ADH?
A
become impermeable leading to dieresis.
7
Q
What does the hormone aldosterone do?
A
induces the DCT to reabsorbs more Na and water. Thus the levels of ADH determine whether urine will be concentrated or diluted.
