Multiple Choice
What is the body's first line of defense against infection?
1) Intact skin and mucous membranes
2) Upper respiratory tract cilia
3) Inflammatory response
A) 1 only
B) 1 and 2 only
C) 1 and 3 only
D) 1, 2, and 3
Correct Answer:
Verified
Correct Answer:
Verified
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