Question

describe the body’s normal response to injury and infection in terms of the different lines of defense; i.e., first, second and third.

Answer 1

Ans) Body's normal response to injury and Infection isI nflammation:

- Body's collective cellular and vascular response to injury; normal response (non-pathological) combined response of local blood vessels, blood cells, plasma proteins, and cells in the surrounding tissues.

The three lines of defense:

1) Barriers at body surfaces:

- Skin layers chemicals in saliva, tears, mucous, etc.
bacteria we have keeps harmful ones out

2) Innate immunity/ non-specific:

- built in automatic when 1st fails
- inflammation and swelling
- compliment proteins
- organs- lymph nodes, spleen, tonsils
General response; inborn general defenses against infection

3) Adaptive immunity/ specific:

- high alert
- some memory some effector-
- effector T cells
- effector B cells