Which statement correctly describes natural killer cells?
Correct answer: A. They are part of innate immunity and kill some abnormal cells
- A. They are part of innate immunity and kill some abnormal cells
- B. They produce antibodies after exposure to a vaccine
- C. They form platelets in the bone marrow
- D. They release clotting factors into damaged vessels
Explanation
Natural killer cells provide rapid innate defence by destroying some virus-infected and tumour cells without prior specific sensitisation. Antibody production is an adaptive immune function of B-cell descendants.
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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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