Partial 3 - Water-electrolyte balance

Question 1

Body fluids vary depending on

Answer 1

Age, gender and body fat

Question 2

How many % of body weight is body fluids?

Answer 2

Usually 60%. In elderly it becomes 45-50% and it is 80% in neonates.

Question 3

Intracellular fluid (ICF) accounts for how much of the total body water?

Answer 3

Intracellular fluid (ICF) accounts for 2/3 of total body water and is decreased in elderly.

Question 4

Extracellular fluid (ECF) accounts for how much of the total body water?

Answer 4

Extracellular fluid (ECF) is 1/3 of total body water, where intravascular fluid accounts for 5%, interstitial fluid (between cells and blood vessels) accounts for 15% and Transcellular (CSF, pericardial, and synovial) accounts for the rest (about 13%).