Excessive accumulation of fluid in tissues outside of the blood vessels is called edema. Which of the following scenarios could result in edema?
A) an increase in the concentration of proteins in the blood
B) a decrease in the volume of blood in the cardiovascular system
C) an alteration of capillary walls so that they are less leaky
D) an increase in the pressure of blood flowing through capillaries

Question

Quizplus · Accepted Answer

An increase in the pressure of blood flowing through capillaries can force fluid out of the blood vessels and into the surrounding tissues, leading to edema. A decrease in blood volume (B) would actually decrease the pressure in the blood vessels and therefore make edema less likely. An alteration of capillary walls to be less leaky (C) would also decrease the likelihood of edema. An increase in the concentration of proteins in the blood (A) would not directly cause edema, although it could potentially contribute to edema if the concentration of proteins in the blood becomes so high that it draws fluid out of the tissues and into the bloodstream.

Excessive Accumulation of Fluid in Tissues Outside of the Blood