★ Immune system Quiz
Which is an example of a human’s first line of defence?
A. Mucus
B. Fever
C. Coagulation cascade
D. Vasocontraction
E. A and C are true
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Which statement about antibodies is correct?
A. antibodies are polypeptides
B. antibodies are produced by bone marrow
C. antibodies are pathogenic foreign substances
D. antibodies kill bacteria but not virus
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