The Normal Human Microbiota Is Considered Part of the fiRst

Multiple Choice

The normal human microbiota is considered part of the first line of defense because ______.

A) resident bacterial cells stimulate phagocytosis of pathogens
B) microbiota cause an inflammatory response, eliminating pathogens
C) pathogens and normal biota cannot exist in the same location
D) microbial antagonism keeps potential pathogens in check