Which is an example of a specific line of defense against an infectious agent?

A) The skin acts as a barrier to infection by the agent.
B) Macrophages engulf the invading agent in the affected tissue.
C) Mucus membranes in the lungs trap the invading pathogens.
D) B cells stick to the invading pathogen's surface.


D

Biology & Microbiology

You might also like to view...

Proteins in thermophiles must be stabilized by van der Waals forces, because hydrogen bonds cannot be maintained at

high temperatures

high temperatures

Biology & Microbiology

In an experiment, control groups are used to identify

1.side effects compared to an experimental group. 2.group experiences of the same conditions. 3.group experiences of different conditions. 4.side effects of a hypothesis.

Biology & Microbiology

Use the Hardy-Weinberg equations: p + q = 1 and p2 + 2pq + q2 = 1. If the dominant allele frequency is 0.8, then what percent of the population will be homozygous recessive?

A. 0.64 B. 0.32 C. 0.04 D. 0.16 E. 0.40

Biology & Microbiology

Intact skin layers are part of the body's (first/second/third) line of defense against pathogens

What will be an ideal response?

Biology & Microbiology