Which of the following statements are true of capillaries? (Read carefully and select all of the correct statements.)
A)Their walls are made of simple squamous epithelium.
B)Blood plasma in capillaries becomes tissue fluid by the process of filtration.
C)The process of osmosis returns some tissue fluid to the blood at the venous end of capillaries.
D)The process of filtration brings dissolved nutrients to tissues.
E)The colloid osmotic pressure of blood is created by plasma proteins such as albumin.
F)The flow of blood into a capillary network is regulated by a precapillary sphincter.

Question

Quizplus · Accepted Answer

A) Capillaries are made up of a single layer of simple squamous epithelium which allows for the exchange of substances between blood and tissues.
B) Blood plasma in capillaries does become tissue fluid, but this occurs through the process of diffusion rather than filtration.
C) Osmosis does occur in capillaries, but it does not return tissue fluid to the blood. Rather, excess tissue fluid is returned to the blood through the lymphatic system.
D) The process of diffusion, not filtration, brings dissolved nutrients to tissues via capillaries.
E) The colloid osmotic pressure of blood is indeed created by plasma proteins such as albumin, which help to maintain the balance of fluids between the blood and tissues.
F) The flow of blood into a capillary network is regulated by a precapillary sphincter, which can constrict to reduce blood flow or dilate to increase blood flow.

Which of the Following Statements Are True of Capillaries? (Read