Wed17November0747PM 8

Regarding fluid balance, which of the following statements is true?

(Please select 1 option)

The microvascular endothelium separating interstitial fluid from the intravascular compartment is freely permeable to water

The intracellular fluid volume is insensitive to changes in the sodium concentration of the extracellular fluid

0.9% sodium chloride solution contains no free water and is thus restricted to the extracellular compartment

After intravenous administration of crystalloids, the distribution of these fluids throughout the body depends on its osmotic activity Correct

In patients with pathological capillary leakage, the oncotic pressure becomes decreasingly important in determining fluid fluxes

Explanation

Oncotic pressure becomes a distinct problem when capillary leakage occurs as in dependent oedema or ascites.

The intracellular sodium concentration is exquisitely sensitive to the extracellular sodium with osmosis resulting in shifts in water between the compartments.

The microvascular endothelium is not freely permeable to water and relies upon a number of processes including osmosis.

Answer Statistics

1

27%

2

3%

3

8%

4

40%

5

25%

Times answered: 220