CBSE Class 9 Science Chapter-13 Important Questions - Free PDF Download
Important questions science class 9 chapter 13 are prepared by the experts of Vedantu. Students are provided with ultimate study materials to perform better in the examination. Science chapter 13 why do we fall ill of class 9 deals with the health of a human being. It teaches the importance to stay healthy and prevent us from falling sick. It focuses on the significance of staying fit and healthy. It casts light on the importance of daily hygiene to keep diseases at bay. Register Online for Class 9 Science tuition on Vedantu.com to score more marks in your examination. Vedantu is a platform that provides free CBSE Solutions (NCERT) and other study materials for students. Maths Students who are looking for the better solutions ,they can download Class 9 Maths NCERT Solutions to help you to revise complete syllabus and score more marks in your examinations.
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Important Questions for CBSE Class 9 Science Chapter 13 - Why Do We Fall ill
FAQs on Important Questions for CBSE Class 9 Science Chapter 13 - Why Do We Fall ill
1. Write a Short Note on Peptic Ulcers.
Ans: For many long years people use to think that peptic ulcers are caused because of the lifestyle reasons of an individual. Peptic ulcers are a disease that causes acidity related pain as well as bleeding in the stomach and duodenum. This leads to indigestion in the stomach of the individual suffering from peptic ulcers.
Everyone used to think that too much stress led to a lot of acid secretion in the stomach which causes peptic ulcers. Then two Australians discovered that a bacterium named Helicobacter pylori was responsible for causing peptic ulcers in the stomach.
Robin Warren born in 1937 and Barry Marshall born in 1951 who was a young clinical fellow made this discovery. A peptic ulcer is not a chronic disease. It is a disease that can be cured in a short period with antibiotics.
2. Write in Brief about Immunization.
Ans: The traditional Indian as well as the Chinese medicinal systems sometimes deliberately rubbed the skin crusts from smallpox victims into the skin of the healthy person. This was done to create a resistance against the disease into the body of the healthy person.
Two centuries ago an English physician named Edward Jenner realized that maids who have cowpox did not catch smallpox. Cowpox is a very mild disease. Jenner then deliberately gave cowpox to people and found out that it was a resistance to smallpox.
This happened because the smallpox virus was very closely related to the cowpox virus. ‘Cow’ is ‘Vacca’ in Latin and cowpox is ‘vaccinia’ and this is how the word ‘vaccination’ came into usage.
3. Name any two groups of microorganisms from which antibiotics could be extracted.
Ans: Antibiotics are pharmaceutical drugs, produced to destroy or prevent the growth of the disease-causing bacteria in the human and animal body. Bacteria and Fungi are two groups of microorganisms that help make antibiotics. Various variants of bacteria and fungi are used in making antibiotics merged along with different chemicals that can effectively treat a particular illness. Antibiotics are of numerous types like tablets, syrups, and capsules and are consumed in different manners.
4. Why are we advised to take bland and nourishing food when we are sick?
Ans: Sickness results in weak digestion and low immunity, so doctors recommend us to take bland food that is easy on our stomach and nourishing food that refuels our immune system. Fruits and other edibles rich in vitamins are also suggested for a rapid recovery. It is essential to take easy-to-digest and fulfilling food along with the prescribed medicines for a quick recovery. Though the type of food intake may differ for certain illnesses.
5. Why is AIDS considered to be a ‘Syndrome’ and not a disease?
Ans: AIDs stands for Acquired Immune Deficiency Syndrome. If a person suffers from AIDS, then they experience symptoms like fever, weakness, weight loss, etc. A syndrome refers to a set of health issues that combine to make a disease. Hence, due to the regular symptoms of certain health problems AIDS is considered to be a syndrome and not a disease. It is to be noted that various treatments have been discovered that ease the symptoms but AIDS cannot be fully cured.
6. Why are antibiotics not effective for viral diseases?
Ans: Antibiotics are medicines formed using chemicals and extracts from bacteria and fungi used to treat various illnesses. Antibiotics treat bacterial infections by destroying the cell walls of the bacteria. Viruses do not have a cell wall which is why viral diseases cannot be treated with antibiotics. One can recover from viral diseases by building the immune system by eating healthy. The medicines help with certain symptoms but nourishing food is the main requirement in assisting the body fight the viruses responsible for the disease.
7. Why do we fall ill (Chapter 13 of Class 9 Science, Important question)?
Ans: We often suffer from acute diseases like the common cold and so on owing to the attacks of viruses or bacteria, lack of public health services, and inadequate nourishment. It is essential to look after ourselves and take preventive measures to avoid falling sick. Medicinal science has grown to provide us with various vaccines for deadly diseases while other common diseases can be treated with medicines and healthy food and sanitary habits.