Which term means a heightened reaction to an antigen?
A) Hypersensitivity
B) Pallor
C) Syncope
D) Tinnitus

Question

Quizplus · Accepted Answer

Hypersensitivity refers to an exaggerated immune response to an antigen, which may result in symptoms such as inflammation, redness, itching, and swelling. The response can occur immediately (as in type I hypersensitivity reactions, such as allergies) or several hours later (as in type IV hypersensitivity reactions, such as contact dermatitis). Pallor, syncope, and tinnitus are not directly related to immune responses. Pallor refers to a pale appearance of the skin, syncope refers to fainting or loss of consciousness, and tinnitus refers to ringing in the ears.

Which Term Means a Heightened Reaction to an Antigen