A monocyte leaves the bloodstream and enters an infected tissue. Which cell does it usually become?

Correct answer: A. Macrophage

  • A. Macrophage
  • B. Plasma cell
  • C. Eosinophil
  • D. Mast cell

Explanation

Monocytes develop into macrophages after entering tissues, where they phagocytose organisms and cellular debris. Plasma cells produce antibodies, while eosinophils and mast cells have different functions.

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Blood and immunity covers plasma, red blood cells, white blood cells, platelets, haemoglobin, blood groups and haemostasis. It explains innate and adaptive defenses, antibodies, lymphocytes, inflammation, vaccination and immune memory, with a distinction between active and passive immunity and between antigen and antibody.

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