Body Fluid Compartments

Question 1

List the different body compartments

Answer 1

1. Intracellular
2. Intravascular
3. Interstitial
   Intravascular & interstitial= extracellular

Question 2

Gibbs Donnan effect

Answer 2

Opposition of forces between the hydrostatic and oncotic pressures

Question 3

List the primary solutes of different body compartments

Answer 3

1. 60% water in men, 50% water in females

2. “stuff”

Question 4

Osmolality

Answer 4

total free solute (Kg of solvent)

Question 5

Osmolarity

Answer 5

total free solute (Liter of solvent)

Question 6

Albumin

Answer 6

1 mM

Critical to fluid shift & placement

Question 7

Anion gap equation

Answer 7

Na+ - (Cl- + HCO3-)
Normal gap is 8-12
> some anion that has been dumped into the system

Question 8

Interstitial Fluid

Answer 8

Plasma WITHOUT albumin

Question 9

Pc

Answer 9

Pressure within the capillary

Question 10

(Pi)c

Answer 10

Oncotic pressure within the capillary

Question 11

Gibbs Donnan equation

Answer 11

Kf(force favoring filtration P) - (forces favoring reabsorption pi)

Question 12

Isosmotic

Answer 12

Any solution that has ~ 300 mOsoms

Question 13

Isotonic

Answer 13

Any solution that will NOT change the volume of a cell

Question 14

Isoncotic

Answer 14

Any solution with 1 mM of plasma albumin

Question 15

Protein Osmotic Pressure

Answer 15

Many aliases: oncotic pressure, colloid pressure, osmotic pressure

Question 16

Calculate total body water

Answer 16

60% of the persons weight

Question 17

Intracellular body water

Answer 17

2/3 rds of 60%

Question 18

Extracellular body water

Answer 18

1/3 of 60%

Question 19

Interstitial body water

Answer 19

3/4 of extracellular body water

Question 20

Plasma body water

Answer 20

1/4 of extracellular body water

Question 21

Volume depletion

Answer 21

extracellular volume loss from ANY cause- most often loss of salt & water

Question 22

Dehydration

Answer 22

Presence of hypernatremia due to pure water loss