Question

Note the following:
(A) Skin (B) Phagocytes (C) B-cells (D) Inflammation (E) Antibodies (F) T-cells (G) Fever (H) Antimicrobial proteins (I) NK-cells (J) Secretions
Identify the factors involved in $2^{nd}$ line of defence.

• A. $\left(B\right),\left(D\right),\left(G\right)$ and $\left(I\right)$
• B. $\left(B\right),\left(C\right),\left(E\right)$ and $\left(I\right)$
• C. $\left(D\right),\left(F\right),\left(H\right)$ and $\left(J\right)$
• D. $\left(C\right),\left(E\right),\left(G\right)$ and $\left(H\right)$

Answer 1

Answer: (A)

$\left(B\right),\left(D\right),\left(G\right)$ and $\left(I\right)$

If pathogens are able to get past the first line of defence, for example, through a cut in your skin, an infection develops. The second line of defence is a group of cells, tissues and organs that work together to protect the body.

In our bodies the second line of defense is non-specific immune responses - macrophages, neutrophils, interferons, and complement proteins. This line of defense also includes fever and inflammatory response as nonspecific defenses.

So, the correct option is A.