A Specific Condition or Event in the Environment That Challenges

question 137

Essay

A specific condition or event in the environment that challenges or threatens a person is called a(n)__________.

---

Definitions:

Antibody

Protein produced in response to the presence of an antigen; each antibody combines with a specific antigen.

Antigen

A substance that stimulates an immune response, especially the production of antibodies, because it is recognized by the body as foreign.

Variable Region

A region in an antibody's structure that varies among different antibodies, allowing them to bind to a vast array of antigens.

Adaptive Immunity

Type of immunity that is characterized by the response of lymphocytes to specific antigens.