Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Active and passive cell uptake of particles: (A) phagocytosis, (B) caveolin-mediated endocytosis, (C) clathrin–caveolin-independent endocytosis, (D) clathrin-mediated endocytosis, (E) macro-pinocytosis, (F) ion pumps, (G) exocytosis, (H) facilitated diffusion, and (I) simple diffusion.
