CLEARANCE Flashcards
1
Q
LOWEST CLEARANCE
A
- GLUCOSE
- ZERO because normally glucose does not appear in the urine
- decrease reabsorption clearance
- Na above ZERO
- urea
2
Q
largest volume that a kidney can clear
A
- 600 ml/min
(120 ml/min PAH by filtration and 480 ml/min by secretion)
3
Q
clearance of INULIN is the volume filtered
A
- 120 ml/min = GFR
- SLIGHT increase secretion clearance of CREATININE
4
Q
ALDOSTERONE INCREASES
A
- reabsorption of SODIUM
- DECREASING THE CLEARED VOLUME
5
Q
PTH
A
- increases calcium reabsorption
- decreases the volume cleared
- increase clearance of PO4
6
Q
dehydrated individual
A
- clearance of UREA IS DECREASED
7
Q
diuresis
concept UREA always follows WATER
A
- clearance of UREA IS INCREASED
8
Q
when is GLUCOSE HAS A POSITIVE CLEARANCE
A
- as soon as it appears in the urine
9
Q
CREATININE VALUE
A
- is always slight increase in GFR (120ml/min)
10
Q
free water clearance is measured
A
- by the balance between solute and water excretion
- is used to determine whether kidney are responding to maintain normal plasma osmolarity
- pure water loss in the urine
11
Q
normal urine osmolarity
A
- 300 mOsm/L
12
Q
(+) C h20 hypotonic urine
A
- osmolarity
13
Q
(-) C h20 hypertonic urine
A
- osmolarity > 300 mOsm/L
