Module 2: Body Fluids

Question 1

Intracellular fluid compartment

Answer 1

ICF

67% total body water

Question 2

Extracellular fluid compartment

Answer 2

ECF
2 parts:
- interstitial fluid (26.4% total body water)
- plasma (6.6% total body water)

Question 3

Total body water

Answer 3

TBW
Amount of water in a person
In a 70kg person = 42L

Question 4

Plasma

Answer 4

• 92% water, 8% other substances (ions, nutrients, waste products)
• pale yellow fluid
• colloidal solution: liquid containing suspended substances that don’t settle out of solution (albumins, globulins, fibrinogen… all plasma proteins)
• centrifuged blood sample: plasma, Buffy coat (white blood cells and platelets), red blood cells

Question 5

Ions that have a higher concentration outside of the cell than inside

Answer 5

Unit: mOsm/L H20
Na+ (15 in, 150 out)
Cl- (9 in, 125 out)
Ca++ (0 in, 2.4 out)

Question 6

Ions that have a greater concentration inside the cell than outside

Answer 6

Unit: mOsm/L H20
K+ (150 in, 5 out)
Protein ions (Pr) (4 in, 0.2 out)

Question 7

Cell membrane

Answer 7

The semi permeable material between the intracellular fluid compartment and extracellular fluid compartment