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JAMB Biology 1985 Question 20

Question 20

Transport in Animals

Blood platelets are important because they

  1. A.are amoeboid and nucleated
  2. B.produce antitoxins
  3. C.produce antibodies
  4. D.digest harmful bacteria
  5. E.release thrombin for blood clotting.
Show the answer and explanation

Answer: E (release thrombin for blood clotting.)

Explanation

Platelets start blood clotting at a wound by releasing the substance that leads to thrombin being formed. Antibodies and antitoxins come from white cells.