Body Fluids & Membrane Transport

Question 1

Give fat composition % of 30-year-old 70kg male

Answer 1

18%

Question 2

Give lean body mass composition % of 30-year-old 70kg male

(lean body mass - soft organs/muscles)

Answer 2

22%

Question 3

Give water composition % of 30-year-old 70kg male

Answer 3

60%

Question 4

Difference in body fluids and their compartments between sexes:

Answer 4

More adipose tissue and less water in females, males contain more muscle mass.

Question 5

What is intracellular fluid (ICF)?

Answer 5

Fluid within cells

Question 6

How much intracellular fluid (ICF) do we have?

Answer 6

25 litres

Question 7

TRICKY:

Give the composition of intracellular fluid (ICF):

Answer 7

• Low Na+ conc (15mM)
• High K+ conc (120 mM)
• Low Cl- conc (20mM)
• High protein conc (4mM)

Question 8

What is Interstitial Fluid (type of ECF)?

Answer 8

Fluid outside of blood vessels, not in cells.

Question 9

How much Extracellular fluid (ECF) do we have in litres?

Answer 9

17 litres

Question 10

TRICKY:

Give composition of Interstitial Fluid:

Answer 10

•  High Na+ conc (145mM)
•  Low K+ conc (4.5mM)
•  High Cl- conc (116mM)
•  No/little protein (0mM)

Question 11

How much interstitial fluid do we have in litres?

Answer 11

13 litres

Question 12

How much plasma do we have in litres?

Answer 12

3 litres

Question 13

TRICKY

Give composition of Plasma

Answer 13

•  High Na+ conc (142mM)
•  Low K+ conc (4.4mM)
•  High Cl- conc (102mM)
•  Low protein conc (1mM)