Which term describes high sensitivity to a substance, often leading to allergic reactions?

Which term describes high sensitivity to a substance, often leading to allergic reactions?

• A. Allergy
• B. Anaphylaxis
• C. Angina
• D. Asthma

Answer: (A)

An allergy is an exaggerated immune response to a substance that is usually harmless. When someone with an allergy encounters the allergen, the immune system overreacts and releases chemicals like histamine, leading to symptoms such as sneezing, itching, hives, or swelling. This high sensitivity is what the term describes, and it captures the idea of reactions to common triggers like pollen, foods, or insect stings. Anaphylaxis is a severe, life-threatening reaction that can occur in some allergic responses, but not every allergy leads to anaphylaxis. Angina is chest pain caused by reduced blood flow to the heart, and asthma is a chronic airway condition that can be triggered by allergens but is not defined by a general sensitivity to a substance.

An allergy is an exaggerated immune response to a substance that is usually harmless. When someone with an allergy encounters the allergen, the immune system overreacts and releases chemicals like histamine, leading to symptoms such as sneezing, itching, hives, or swelling. This high sensitivity is what the term describes, and it captures the idea of reactions to common triggers like pollen, foods, or insect stings.

Anaphylaxis is a severe, life-threatening reaction that can occur in some allergic responses, but not every allergy leads to anaphylaxis. Angina is chest pain caused by reduced blood flow to the heart, and asthma is a chronic airway condition that can be triggered by allergens but is not defined by a general sensitivity to a substance.