Question

Cell surface recognition occurs during many types of immune responses, including immediate and induced immune responses. How do natural killer cells and interferons represent one of each type of immune response (immediate and induced), and how does cell surface recognition play a role?

a) Natural killer cells represent an immediate response, while interferons represent an induced response; cell surface recognition identifies self from non-self.
b) Interferons represent an immediate response, while natural killer cells represent an induced response; cell surface recognition identifies foreign substances.
c) Both natural killer cells and interferons represent immediate responses; cell surface recognition is not involved.
d) Both natural killer cells and interferons represent induced responses; cell surface recognition occurs only in adaptive immunity.

Answer 1

Natural killer cells are an example of immediate immune response, while interferons are an example of induced immune response.

Step-by-step explanation:

b. Natural killer cells are an example of immediate immune response as they attack host cells that have lost normal cell surface markers. Interferons are an example of induced immune response as they are induced after cell surface markers on invading pathogens are recognized by host cells.