Which platelet action occurs early after damage to a blood vessel?
Correct answer: A. Adhesion to exposed damaged tissue
- A. Adhesion to exposed damaged tissue
- B. Production of antibodies against bacteria
- C. Destruction of aged red blood cells
- D. Release of oxygen into body tissues
Explanation
Platelets adhere to exposed structures at the injured vessel wall and help form the initial platelet plug. Antibodies are produced by activated B lymphocytes, not platelets.
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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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