Which statement best describes the role of memory lymphocytes?
Correct answer: C. They allow a faster response to a later exposure
- A. They digest bacteria during the first response
- B. They produce clotting factors in plasma
- C. They allow a faster response to a later exposure
- D. They prevent all microorganisms entering the skin
Explanation
Memory B and T lymphocytes remain after an initial specific immune response and help the body respond more rapidly during later exposure to the same antigen. They do not replace phagocytes, clotting factors or physical barriers.
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About Blood and Immunity
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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