a. Acquired, specific immunity. b. A cellular second line of defense. c. An opportunistic infection. d. Inflammation e

[answerhappygod]

a. Acquired, specific immunity.
b. A cellular second line of defense.
c. An opportunistic infection.
d. Inflammation
e. A chemical barrier function .
2. Many microbes that are resident flora benefit the host by
a. Breaking down cells in healthy tissue
b. Antagonizing the growth of pathogenic organisms
c. Entering previously sterile tissues
d. Releasing metabolites that harm tissue, such as pyruvate
e. Reducing the oxygen available to the host
3. true or false: most true pathogens have a similar infectious dose of about 1000 infectioua microbial cells