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Allergies occur when the body responds to __________.a. pathogensb. toxinsc. normally harmless substancesd. all of the above
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Allergies are a reaction of the immune system to certain substances that are generally not harmful. Show more…
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Allergies occur when the immune system responds to________. a. pathogens b. toxins c. normally harmless substances d. all of the above
Substances which cause allergy are known as (a) Mutagens (b) Irritants (c) Allergens (d) Agglutinogens
Allergens a. cause an immune response in most people. b. are antigens to those people who are allergic to them. c. reduce the production of histamine by mast cells. d. are molecules that are usually rare in the environment.
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