L23 Fluid Compartments Flashcards
Why do women tend to have a lower percentage of body water than men?
They generally have more adipose tissue, this holds much less water than muscle.
What are the extracellular fluid compartments in the body?
Interstitial Fluid (25% TBW)
Plasma (8% TBW)
Transcellular Fluid (2% TBW)
(extracellular fluid accounts for 35% of total body water)
Intracellular fluid accounts for how much of an individual’s total body water?
~65%
In which fluid compartment is potassium the major cation?
A) Interstitial Fluid
B) Plasma
C) Transcellular Fluid
D) Intracellular Fluid
D) Intracellular Fluid
What are the major anions in intracellular fluid?
Proteins and phosphate
What is the major cation in extracellular fluid?
Sodium
What are the major anions in extracellular fluid?
Chloride and bicarbonate
How much protein and lipid is found in 1 litre of plasma?
70ml
This means 1 litre of plasma contains ~930ml of actual fluid.
What separates plasma fluid from interstitial fluid?
Capillary endothelium
How is excess interstitial fluid drained?
Lymphatic system
Which fluid compartment is urine, CSF, lymph, and synovial fluid a part of?
A) Intracellular Fluid
B) Plasma Fluid
C) Interstitial Fluid
D) Transcellular Fluid
D) Transcellular Fluid
Which of the following has the highest concentrations of sodium?
A) Plasma
B) Interstitial Fluid
C) Intracellular Fluid
D) Urine
D) Urine
Which of the following has the highest concentrations of potassium?
A) Plasma
B) Interstitial Fluid
C) Intracellular Fluid
D) Urine
C) Intracellular fluid
Why does interstitial fluid have a lower protein concentration than plasma?
The plasma proteins are too large to leave the capillaries.
Intracellular fluid is also higher in proteins because they are made in cells.
