Biology Human Health & Diseases part 17 (Allergies) class 12 XII

TL;DR

Allergy is an exaggerated response of the immune system to certain substances, causing symptoms such as sneezing, inflammation, and itching.

Transcript

hello friends this video on human health and disease is part 17 is brought to you by exam for calm no more fear from exam so we are now going to talk about allergies now many of you would have heard the term allergy because it is very common some of us get eye allergy some of us get allergy due to dust or due to pollen so let us see what exactly is... Read More

Key Insights

• ❓ Allergy is an exaggerated response of the immune system to certain substances.
• ❓ Allergens include dust, pollen, perfumes, and animal dander, among others.
• 🥶 Allergic reactions can manifest in various ways, such as sneezing, cold symptoms, and inflammation.
• ⌛ Anti-allergen medication can be used to treat allergies that persist for a long time.
• 😋 Allergic reactions to specific food items can be diagnosed through tests.
• 😋 Some individuals may be allergic to certain food items, such as brinjal.
• ❓ Allergies are not diseases but rather an exaggerated immune system response.

Questions & Answers

Q: What is an allergy?

An allergy is an exaggerated response of the immune system to certain substances, causing symptoms such as sneezing, inflammation, and itching.

Q: What are some examples of allergens?

Common allergens include dust, pollen, perfumes, and animal dander. These substances can trigger allergic reactions in susceptible individuals.

Q: How do allergens cause allergic reactions?

Allergic reactions occur due to the release of histamine and serotonin from mast cells. These chemicals cause symptoms such as sneezing, running nose, watery eyes, and breathing problems.

Q: How are allergies diagnosed?

Allergies can be diagnosed through specific tests where different types of food items are injected into the body, and the reaction is observed. This process helps to identify which particular food item causes the allergy.

Summary & Key Takeaways

• Allergies occur when the immune system overreacts to certain substances, known as allergens.

• Common examples of allergens include dust, pollen, perfumes, and animal dander.

• Allergic reactions can manifest in various ways, such as sneezing, cold symptoms, and inflammation.