SEBA Class 9 Science Important Chapter 13 Why Do we Fall ill

SEBA Class 9 Science Important Chapter 13 Why Do we Fall ill Solutions English Medium As Per SEBA New Syllabus to each chapter is provided in the list so that you can easily browse through different chapters SEBA Class 9 General Science Additional Solutions and select need one. NCERT Important Solutions For Class 9 General Science Download PDF. Important Notes for Class 9 Science.

SEBA Class 9 Science Important Chapter 13 Why Do we Fall ill

Also, you can read the NCERT book online in these sections Solutions by Expert Teachers as per Central Board of Secondary Education (CBSE) Book guidelines. Assam SEBA Board Class 9 Science Additional Question Answer are part of All Subject Solutions. Here we have given CBSE Class 9 Science Important Notes for All Chapters, You can practice these here.

Why Do we Fall ill

Chapter: 13

IMPORTANT QUESTION ANSWER

Answer the Following Question:

1. State any two conditions essential for being free of disease.

Ans: (i) Absence of specific pathogens or disease-causing agents.

(ii) Proper functioning of the body’s immune system.

2. Are the answers to the above questions necessarily the same or different? Why?

Ans: The answers are different because good health includes both physical and mental well-being, while being free from disease is merely the absence of a specific illness or infection.

3. How do diseases manifest in the body?

Ans: Diseases manifest when one or more systems in the body malfunction, causing symptoms (e.g., fever, pain) and signs (e.g., swelling, rash) of illness.

4. What are the major causes of disease in humans?

Ans: Infectious Agents: Microbes like viruses, bacteria, fungi, protozoa, and worms.

Non-Infectious Causes: Genetic abnormalities, poor nutrition, lifestyle factors.

5. What role do vectors play in the spread of disease?

Ans: Vectors, such as mosquitoes, carry pathogens from infected individuals to healthy individuals, spreading diseases like malaria and dengue. 

6. How does overcrowding affect health?

Ans: Overcrowding increases the risk of airborne diseases (e.g., common cold, tuberculosis) as pathogens can spread more easily in close proximity.

7. How does the immune system protect us from diseases?

Ans: The immune system identifies and attacks harmful pathogens (viruses, bacteria) through specialized cells, preventing infection and minimizing the severity of diseases.

8. Why is clean drinking water important for health?

Ans: Clean drinking water is essential for preventing waterborne diseases like cholera, diarrhoea, and typhoid, which can cause severe dehydration and affect overall health.

9. What is the role of food in maintaining good health?

Ans: Food provides essential nutrients like vitamins, minerals, proteins, and carbohydrates, which are necessary for maintaining healthy body functions, energy levels, and immune system strength.

10. Explain the concept of disease.

Ans: Disease refers to a specific disturbance in the normal functioning of the body, often caused by pathogens like bacteria, viruses, or environmental factors.

11. What is the significance of the immune system in health?

Ans: The immune system protects the body from pathogens by recognizing and attacking harmful microbes, preventing infections and diseases from spreading.

12. Explain the concept of acute diseases with examples.

Ans: Acute diseases are short-term illnesses that resolve quickly, usually within days or weeks. 

Examples: Common cold, Influenza.

13. Define chronic diseases and give two examples.

Ans: Chronic diseases last for long periods, often for a lifetime, and may have long-term effects on health. 

Examples: Asthma, Tuberculosis.

14.  What are vectors in the context of infectious diseases?

Ans: Vectors are organisms like mosquitoes or flies that carry disease-causing microbes from one host to another, spreading diseases like malaria and dengue.

15. Why is sanitation important for health?

Ans: Sanitation prevents the spread of diseases by ensuring clean surroundings, proper disposal of waste, and safe drinking water, reducing the risk of infections like cholera and diarrhoea.