L2: Body Fluid Compartments & Water Transport Flashcards
1
Q
Total Body Water (TBW) of Men
A
60% of body weight
2
Q
Total Body Water (TBW) of Women
A
50% of body weight
3
Q
ICF
A
60% of TBW
4
Q
ECF
A
40% of TBW
5
Q
What does the ECF consist of?
A
- Interstitial fluid
- Plasma
- Transcellular flluid
6
Q
Interstitial fluid is ___% of ___ fluid
A
75% of ECF
7
Q
Plasma volume is ___% of ___ fluid
A
20% of ECF
8
Q
Transcellular fluid is ___% of ____ fluid
A
5% of ECF
9
Q
Blood volume =
A
PV/(1 - Hct)
10
Q
Composition of Interstitial fluid (avg 13L)
A
Bulk IF (8L)
Bone (2L)
Dense connective tissue (3L)
11
Q
Avg osmolality of all body fluids
A
290 mOsm
12
Q
Men Hct
A
45%
13
Q
Women Hct
A
40%
14
Q
Average Blood Volume for 70kg male
A
BV = PV/(1 - Hct) PV = 70*0.6*0.4*0.2 = 3L BV = 3/(1 - 0.45) = 5.45L
15
Q
ICF [Na+]
A
15mM
16
Q
ICF [K+]
A
120mM
17
Q
ICF [Cl-]
A
20mM
18
Q
ICF [Protein]
A
4mM
19
Q
IF [Na+]
A
145mM
20
Q
IF [K+]
A
4.5mM
21
Q
IF [Cl-]
A
116mM
22
Q
IF [Protein]
A
0mM
23
Q
Blood plasma ion concs
A
Similar to IF
24
Q
Major difference between plasma and IF
A
absence of plasma proteins from interstitium
25
Gain =
Correction / Error
26
If a diatomic molecule dissociates then how many osmols are produced from 1 mole of the molecule?
2 osmols
27
Isosmotic solution causes
no change in cell volume
28
hypotonic solution causes
cell swelling
29
hypertonic solution causes
cell shrinkage
30
how much energy goes into maintaining resting ion gradients?
30%
