Question

The immune systems line of defense ______ includes the two types of immune response?

Answer 1

The immune system responds to antigens by producing cells that directly attack the pathogen, or by producing special proteins called antibodies.

Step-by-step explanation:

Specific immune responses are triggered by antigens. Antigens are usually found on the surface of pathogens and are unique to that particular pathogen. The immune system responds to antigens by producing cells that directly attack the pathogen, or by producing special proteins called antibodies.

The immune system review (article) | Khan Academy

Answer 2

The immune produce cells known as antibodies to respond antigens.