GENERAL HISTOLOGY

LYMPHATIC

LYMPHATIC SYSTEM

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What is the body’s hypersensitive response to an outside substance that is otherwise harmless?
A
autoimmune disease
B
allergy
C
Hodgkin’s disease
D
cardiovascular disease
Explanation: 

Detailed explanation-1: -Allergic reactions (hypersensitivity reactions) are inappropriate responses of the immune system to a normally harmless substance. Usually, allergies cause sneezing, watery and itchy eyes, a runny nose, itchy skin, and rash. Some allergic reactions, called anaphylactic reactions.

Detailed explanation-2: -Summary. A hypersensitivity reaction occurs when the body produces an unnecessary and undesirable immune response following exposure to a certain antigen. Many people refer to hypersensitivity as a form of allergy.

Detailed explanation-3: -Type I: reaction mediated by IgE antibodies. Type II: cytotoxic reaction mediated by IgG or IgM antibodies. Type III: reaction mediated by immune complexes. Type IV: delayed reaction mediated by cellular response. 14-Aug-2022

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