urine excretion Flashcards
1
Q
what is plasma clearance
A
the volume of plasma cleared of substance per minute
2
Q
what is plasma clearance a measure of
A
GFR
3
Q
when is plasma clearance = GFR, example of such substance
A
when a substance is filtered but not reabsorbed e.g. inulin
4
Q
what else can be used to determine GFR
A
creatinine , the end product of muscle metabolism
5
Q
when is plasma clearance lower than GFR
A
when a substance is filtered and reabsorbed and not reabsorbed
6
Q
what substance has a plasma clearance rate of 0
A
glucose because it is all reabsorbed
7
Q
when is plasma clearance higher than GFR
A
when a substance is filtered and secreted but not reabsorbed
