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सी.आई.एस.सी.ई.आईसीएसई ICSE Class 7

Define the Term “Allergy”. - Biology

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प्रश्न

Define the term “allergy”.

परिभाषा

उत्तर

Allergies, also known as allergic diseases, are a number of conditions caused by hypersensitivity of the immune system to something in the environment that usually causes no adverse effects to most people. These diseases include hay fever, dermatitis, asthma, food allergies, etc.

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अध्याय 7: Allergy - Short answer questions

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सेलिना Concise Biology [English] Class 7 ICSE
अध्याय 7 Allergy
Short answer questions | Q 7

संबंधित प्रश्न

Define the term “allergy”.


Name any three allergens.


Write short (1-2 sentences) note on the following:  

Allergy


Inflammatory responses in allergy are caused by the release of one of the following by mast cells:


In the metropolitan cities of India, many children are suffering from allergy/asthma. What are the main causes of this problem. Give some symptoms of allergic reactions.


A person shows strong unusual hypersensitive reactions when exposed to certain substances present in the air. Identify the condition. Name the cells responsible for such reactions. What precaution should be taken to avoid such reactions.


Compare the life style of people living in the urban areas with those of rural areas and briefly describe how the life style affects their health.


During a field trip, one of your friend in the group suddenly became unwell, she started sneezing and had trouble in breathing. Name and explain the term associated with such sudden responses. What would the doctor recommend for relief?


Many people experience allergic symptoms of sneezing or wheezing on exposure to certain substances in the environment. Give two examples of such substances. Which type of antibodies are produced by the body in response to these substances? Mention the role of mast cells in this kind of allergic response.


A boy developed some allergic reactions when he straight entered into his air conditioned room after a game of football outside his house. Write any two symptoms that could be noticed in such condition. How does our body combat such conditions?


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