PATHOLOGY MCQ
IMMUNE RESPONSE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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action of the heart as the intensity of exercise increases
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mechanism that regulates the activity of guard cells
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action of white blood cells when certain bacteria enter the body
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mechanism that maintains the proper level of antibiotics in the blood
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Detailed explanation-1: -Allergic reactions begin in your immune system. When a harmless substance such as dust, mold, or pollen is encountered by a person who is allergic to that substance, the immune system may over react by producing antibodies that “attack” the allergen.
Detailed explanation-2: -Although many foods can cause clinical syndromes in susceptible individuals, the allergic reaction provoked by peanuts is strictly an IgE-mediated type I hypersensitivity reaction. In such reactions, peanut-specific IgE antibodies bind to high-affinity receptors on mast cells and basophils.
Detailed explanation-3: -A food allergy occurs when the immune system reacts to a food which is usually harmless. Food intolerance occurs when the body has a chemical reaction to eating a particular food or drink.
Detailed explanation-4: -Allergic reactions are the result of the production of specific IgE antibody to common, innocuous antigens. Allergens are small antigens that commonly provoke an IgE antibody response. Such antigens normally enter the body at very low doses by diffusion across mucosal surfaces and therefore trigger a TH2 response.