Endocytosis

• Endocytosis is the process of particles / molecules going into the cell.
• The process is meant for bigger molecules, usually food, bacteria, or hormones.
• Phagocytosis:

  • solid particles enter the cell as food
  • membrane comes out to trap the particle
  • "Phago" means "eating"
• Pinocytosis:

  • fluid enters the cell
  • since it's liquid, the membrane just opens up to let it flow into the soon-to-be vesicle
  • "Pino" is for "drinking"
• Receptor-Mediated Endocytosis:

  • protein-receptors select the molecules they need
  • the molecules then attach to the receptors and get closed into a vesicle