Question

Hen there is a cut in the skin and bacteria enter the body, the immune system responds. First, macrophages approach the area of the cut. Next, the macrophages surround any bacterial cells and engulf them. What feature of the immune system is best described by this scenario?
A.
antigen specificity, which is a part of adaptive immunity
B.
the phagocytotic barrier, which is a part of innate immunity
C.
the inflammatory barrier, which is a part of innate immunity
D.
self-recognition, which is a part of adaptive immunity

Answer 1

Correct answer: B). The phagocytotic barrier, which is a part of innate immunity

The scenario represents the phagocytosis, which is a type of endocytosis by which the cell engulfs microbial pathogens. The main cells of the immune system that are involved in phagocytosis include macrophages, neutrophils, and dendric cells.

It is a mechanism which is used by the immune system to kill and processing of antigen that play an important role in innate immune response.

Hence, the correct answer would be option B.

Answer 2

Answer:

the phagocytotic barrier, which is a part of innate immunity