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which of the following is involved in the third line of defense? a. Macrophages b. Interferon...

which of the following is involved in the third line of defense?
a. Macrophages b. Interferon c. Complement d. Plasma cells

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Answer #1

Ans: Plasma cells

Explanation:

3rd line of defence

1. specific immunity or immune system proper
2. identifies and destroys foreign materials

Specificity:

1. response to a particular pathogen
2. developing specific antibody to a virus - that doesn't expand to other pathogens but there is a little overlap with cells of similar nature. Adaptive response mediated by lymphocytes. humoral immunity and cell-mediated immunity.

* In our bodies, the second line of defence is non-specific immune responses - macrophages, neutrophils, interferons, and complement proteins.

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