List three ways in which substances can cross the capillary wall.

Which of the following structures is the 'leakiest'?

a. Continuous capillary

b. Sinusoidal capillary

c. Precapillary sphincter

d. Fenestrated capillary

Which of the following correctly describes the flow of blood through a mesenteric capillary bed when the precapillary sphincters are constricted?

Capillaries consist of:

a. three thin tunics.

b. only a thin tunica intima with a well-developed internal elastic lamina.

c. a thin sheet of endothelium with a basal lamina.

d. stratified epithelium.