body fluids Flashcards
(33 cards)
1
Q
total body fluid
A
42 L
2
Q
extracellular fluid - plamsa
A
3L
3
Q
extracellular fluid - interstitial fluid
A
10L
4
Q
extracellular fluid - transcellular fluid
A
1L
5
Q
intracellular fluid
A
28 L
6
Q
rough water intake daily
A
2 L
7
Q
daily urine production
A
800 - 2000 ml/day
8
Q
volume of other water loss
A
skin = 300-400ml
respiratory tract = 300-400 ml
9
Q
ext Na+
A
140 mM
135-145
10
Q
ext K+
A
4 mM
3.5-5
11
Q
ext Ca2+
A
- 4 mM
2. 12 - 2.62
12
Q
ext Cl-
A
100 mM
95-105
13
Q
ext HCO3-
A
25 mM
22-29
14
Q
ext H+
A
40 nM
pH = 7.4
15
Q
int Na+
A
5-15 mM
16
Q
int K+
A
140 mM
17
Q
int Ca 2+
A
0.1 micromolar (um)
18
Q
int Cl-
A
less than extracellular but big range
19
Q
int HCO3-
A
10-20 mM
20
Q
int H+
A
50-100 nM
21
Q
daily sodium intake
A
max recommended = 2.4g
22
Q
daily intake
A
less than 3.6 g /day
23
Q
estimated daily sodium loss
A
23 mg
24
Q
plasma osmolarity
A
290 mOsM
25
urine osmolarity
30-1200 mOsM
26
pH calc
-log10[H+]
27
normal pH values
```
[H+] = 40nM
pH = 7.4
```
28
defence against alkalosis and acidosis
buffers
ventilatory mechanisms
renal mechanisms
29
use of Henderson hasselbalch equation
estimate the pH of a buffer solution
30
Henderson Hasselbalch equation
pH = Pka + log10 [A-]/[HA]
```
A- = conjugate base
HA = weak acid
```
31
main intracell buffer
haemoglobin
| can also have some proteins and phosphate
32
main extracell buffer
carbonic anhydrase/ bicarbonate
albumin
ammonia
33
buffer concept
can resist changes in ph when small amounts of acid or base are added
