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    The Human Body in Health Study Set 2
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    Exam 21: Immune System
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    Which Group Is Incorrect
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Which Group Is Incorrect

Question 19

Question 19

Multiple Choice

Which group is incorrect?


A) First line of defense: skin,mucous membrane,tears,sneezing
B) Specific immunity: B cells,T cells
C) Mechanical barriers: skin,mucous membrane
D) Chemical barriers: tears,saliva,stomach acid,B cells,T cells

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