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
Correct Answer:
Verified
Correct Answer:
Verified
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Q4: Which group is incorrect?<br>A) mechanical barriers:skin,mucous membrane<br>B)
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