A marker on the surface of a foreign substance that triggers the immune response is called a(n)
A) antibody.
B) pathogen.
C) antigen.
D) enzyme.
Correct Answer:
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Q2: An infection spread throughout the body by
Q3: White blood cells that directly destroy virus-infected
Q4: T cells and B cells are the
Q5: Macrophages act as
A)scavengers of worn-out cells.
B)healers of
Q6: Tears,saliva,and vaginal secretions are rich in _
Q8: Which of the following is a defense
Q9: Swollen lymph nodes are an indication of
A)anemia.
B)poor
Q10: Chemicals responsible for the dilation and increased
Q11: T and B cells help preserve the
Q12: Vessels,organs,and structures that pick up excess fluids,then
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