exocytosis and endocytosis

• What process allows large particles to enter cells?

  Endocytosis
• How does the cell membrane facilitate endocytosis?

  It engulfs particles or liquid to form a vesicle
• What are the steps of endocytosis?

  1. Plasma membrane folds towards engulfing material
  2. Plasma membrane continues to fold
  3. Plasma membrane fuses to enclose the material
• What are the two types of endocytosis?

  Phagocytosis and pinocytosis
• What does phagocytosis mean?

  Cell eating
• What is the role of phagocytes?

  They engulf microbes by phagocytosis
• How does an amoeba demonstrate phagocytosis?

  • An amoeba engulfs a paramecium
  • This illustrates the process of phagocytosis
• What is exocytosis?

  Process of substances leaving the cell
• How are substances transported during exocytosis?

  Through transport vesicles from the rough ER
• What is the role of the Golgi body in exocytosis?

  It processes substances before secretion
• What happens to secretory vesicles during exocytosis?

  They fuse with the cell membrane
• What is the final outcome of exocytosis?

  Contents are secreted outside the cell
• What is the overall process of exocytosis?

  1. Substances transported through cytoplasm
  2. Vesicles from rough ER to Golgi body
  3. Secretory vesicles to cell membrane
  4. Fusion and secretion outside the cell