Phagocytosis

• What are the two types of white blood cells mentioned?

  Phagocytes and lymphocytes
• What is detected by phagocytes in the blood?

  Pathogen
• How does a phagocyte respond to a detected pathogen?

  It moves towards the pathogen
• What do cell surface receptors on phagocytes bind to?

  Antigens on the pathogen
• What is formed when a phagocyte engulfs a pathogen?

  Phagosome
• What moves towards the phagosome after its formation?

  Lysosomes
• What do lysosomes release to aid in digestion?

  Lysozymes
• What do lysozymes digest?

  Cell membrane and pathogen contents
• What happens to the products of hydrolysis in phagocytes?

  They are absorbed by the phagocyte
• What is the process of phagocytosis in phagocytes?

  1. Pathogen detected by phagocytes
  2. Phagocyte moves towards pathogen
  3. Cell surface receptors bind to antigens
  4. Phagocyte engulfs pathogen to form phagosome
  5. Lysosomes move towards phagosome
  6. Lysozymes released to digest contents
  7. Hydrolysis products absorbed by phagocyte