How do substances move across capillaries?
A)diffusion
B)through pores
C)transcytosis
D)all of the above

Question

Quizplus · Accepted Answer

Substances move across capillaries through diffusion, pores, and transcytosis. Diffusion occurs when molecules move from an area of higher concentration to an area of lower concentration. Pores in the capillary walls also allow substances to pass through. Transcytosis involves the movement of substances across endothelial cells and through the basement membrane of the capillary. Therefore, all three mechanisms are involved in the movement of substances across capillaries.

How Do Substances Move Across Capillaries