Multiple Choice
Which structure(s) represent a first line of defense against pathogens?
A) skin
B) inflammation
C) lymphocytes
D) phagocytosis by macrophages
Correct Answer:

Verified
Correct Answer:
Verified
Related Questions
Q41: True or false: Both first- and second-line
Q42: Which disease is caused by bacteria that
Q43: An individual receives a flu vaccine and
Q44: What does the DPT vaccine protect against?<br>A)
Q45: Where are developing lymphocytes tested to determine
Q47: Why does HIV cause disease in people?<br>A)
Q48: True or false: The relationship between the
Q49: What happens during an allergic reaction?<br>A) Immune
Q50: When individuals are first infected with HIV,
Q51: Where would you be most likely to