Active transport in cells that expels large particles from the cell is which process?

Active transport in cells that expels large particles from the cell is which process?

• A. Endocytosis
• B. Exocytosis
• C. Facilitated diffusion
• D. Simple diffusion

Answer: (B)

Exocytosis is the process by which vesicles carrying large particles or molecules move to and fuse with the cell’s outer membrane, releasing their contents outside the cell. This requires energy, so it’s a form of active transport. It specifically handles bulk export of materials that can’t cross the membrane by diffusion. Endocytosis is the opposite—taking material into the cell. Facilitated diffusion and simple diffusion are passive methods that move substances without cellular energy, and they don’t expel large particles.

Exocytosis is the process by which vesicles carrying large particles or molecules move to and fuse with the cell’s outer membrane, releasing their contents outside the cell. This requires energy, so it’s a form of active transport. It specifically handles bulk export of materials that can’t cross the membrane by diffusion. Endocytosis is the opposite—taking material into the cell. Facilitated diffusion and simple diffusion are passive methods that move substances without cellular energy, and they don’t expel large particles.