Lecture 5 - Body Fluids

Question 1

Total body water (TBW) percentages of total weight of males and females

Answer 1

Male: 60%
Female:50%

Question 2

ECF percentage

Answer 2

1/3 of TBW

Question 3

ICF percentage

Answer 3

2/3 of TBW

Question 4

Blood plasma volume percentage

Answer 4

1/4 of ECF

Question 5

Interstitial volume percentage

Answer 5

3/4 of ECF

Question 6

Na mmol/l value in and out of cell

Answer 6

ECF: 140
ICF: 14

Question 7

K mmol/l value in and out of cell

Answer 7

ECF: 4
ICF: 120

Question 8

What electrolytes occur more in cell? outside cell?

Answer 8

ICF: K and proteins
ECF: Na, Cl, Ca

Question 9

Concentration units compared with charge units

Answer 9

Na+: 135-145mmol/L = 135-145mEq/L
Ca++: 2.1- 2.8 mmol/L = 4.2-5.6mEq/L
Cl-: 108mmol/L = 108mEq/L
Protein: 6.0-8.0 g/dL

Question 10

Concentration units compared with osmolarity

Answer 10

Ca++:
2.1- 2.8 mmol/L = 4.2-5.6 mEq/L = 2.1-2.8 mOsm/L
Na+:
135-145mmol/L = 135-145 mEq/L =135-145 mOsm/L
NaCl:
5mmol/L= 10 mOsm/L

Question 11

Normal osmolarity in cells

Answer 11

290 mOsm/L
Above is hyperosmotic
Below is hyposmotic

Question 12

Tonicity solutions

Answer 12

hypertonic – cell shrinks
isotonic – no volume change
hypotonic – cell swells.

Question 13

Fluid infusion table

Answer 13

Add isotonic NaCl: Extracellular volume increase
Add hypotonic NaCl: Extracellular volume increase, intracellular volume increase, osmolarity decrease
Add hypertonic Nacl: Extracellular volume increase,
Intracellular volume decrease, osmolarity increase.

Question 14

What would happen if patient was dehydrated?

Answer 14

Extacellular and intracellular volume decrease, osmolarity increase

Question 15

Drinking sea water or adding salt without water would

Answer 15

Extracellular volume: increase
Intracellular volume: decrease
Osmolarity: increase