Question

which of the following statements regarding natural immunity is false?
a natural immunity includes receiving antibodies from the mother through the placenta.
b natural immunity does not require prior exposure to the pathogen.
c a good example of natural immunity is the macrophage.
d natural immunity mechanisms are not specific to any particular pathogen.

Explanation:

Natural immunity, also known as innate immunity, is the body's first - line defense. It includes physical barriers, phagocytic cells like macrophages, and is non - specific. Receiving antibodies from the mother through the placenta is natural passive immunity. Macrophages are part of natural immunity and natural immunity mechanisms are non - specific. However, natural immunity does require prior exposure to a pathogen to mount a response, even though it's a non - specific response.

Answer:

B. Natural immunity does not require prior exposure to the pathogen.