Are you looking for Why Do We Fall Ill Extra Questions and Answers, if yes? then you the right place. Here we are providing Why Do We Fall Ill Extra Questions and Answers Class 9 Science Chapter 13.
Why Do We Fall Ill Extra Questions and Answers Science Chapter 13
- MCQ’S
1.) Which of the following is a contagious disease?
(a) High blood pressure
(b) Fracture
(c) Chicken pox
(d) Cancer
2.) Mosquitoes in our surrounding
(a) multiply fast and environmental hazards
(b) are vectors for diseases
(c) cause infections of the skin
(d) all of the above
3.) Cholera is transmitted through
(a) air
(b) food
(c) water
(d) personal contact
(4) The MMR vaccine is given for the immunity against which one of the following
(a) Hepatitis
(b) Measles
(c) Jaundice
(d) Tuberculosis
(5) Vectors are_________
(a) host organisms carrying infectious microorganisms from sick to healthy person
(b) pathogenic microorganisms.
(c) only cause plant diseases.
(d) all the above
(6) Common cold, pneumonia and tuberculosis are infections that have one thing in common that is
(a) All of them are caused by viruses
(b.) All of them is transmitted by air
(c) All of them are spread by water
(d) All of the above
(7) When microbes are the cause of disease, it is usually an ____________.
(a) non-infectious
(b) acute disease
(c) chronic disease
(d) infectious disease
8.) Immunization was first carried out by ________ two centuries ago.
(a) Edward Jenner
(b) Robert Hooke
(c) Anthony van Leeuwenhoek
(d) Louis Pasteur
9.) Which of the following is a chronic disease?
(a) Tuberculosis
(b) Diarrhoea
(c) Common cold
(d) fever
10.) The disease ______________ is spread by sexual contact.
(a) common cold
(b) syphilis
(c) Tuberculosis
(d) Leprosy
- Answer in one sentence (1 mark)
1.) What is infectious disease?
Ans. The Diseases where microbes are the immediate causes are called infectious diseases.
2.) What is the cause of peptic ulcers?
Ans. Helicobacter pylori is the bacteria which causes peptic ulcers
3.) How does the antibiotic penicillin work?
Ans. The antibiotic penicillin blocks the process that make the cell wall in bacteria.
4.) Determine if the diseases listed below are contagious or not:
a.) AIDS b.) Tuberculosis c.) Hypertension d.) Cancer
Ans. In the above list AIDS and Tuberculosis are contagious whereas Hypertension and Cancer are not contagious
5.) What are antibiotic?
Ans. these are chemicals produced by bacterial or fungi which prevent or inhibit the growth of other microorganisms.
- Answer in short (2 marks)
1.) What is difference between acute and chronic disease?
Ans.1.) Diseases are classified as acute or chronic, depending on their duration.
- Our health is affected when a disease is caused
- In case of acute disease, the duration of disease is quite small so the general health is not affected much
- In case of chronic disease, as the disease duration is long it will have a serious effect on our health.
2.) Why do different microorganisms colonize in different organs or tissues?
Ans. Distinct microbe species appear to have adapted to target different regions of the body. This decision is influenced in part by their port of entry. If they enter through the nose, they are most likely to inhabit the lungs.
Q.3) What is the immediate cause of disease?
Ans. In case of infectious disease microbes are listed under infectious causes if they are the immediate cause of an illness. In non-infectious disease no infectious agents or external causes account for disease. Noninfectious diseases are frequently caused by internal causes. Diabetes, cancer, high/low blood pressure, and other diseases are examples of non-infectious diseases.
Q.4) Give any 2 examples of an illness caused by a virus, bacterium, protozoa and fungi.
Ans. the 2 examples of virus, bacterium, or protozoa which cause illness are as follows
1.) Virus:influenza,dengue fever.
2.) Bacterium:typhoidfever, cholera
3.) Protozoa:malaria and kalaazar
4.) Fungi: Fungal Eye Infections, Skin infection
- Answer in brief (5 marks)
Q.1) State the five ‘F’ for Prevention of transmission diseases.
Ans. Prevention of transmission diseases can be done by maintaining hygiene and sanitation
- The five ‘F’ of Prevention of transmission diseases are Fluids, Fingers, Flies, Floods, Fields.
- Fluid: Protect the water from the source. Also, one should store and treat water safely.
- Fingers: Wash hands before preparing and consuming food. One should also wash hand after defecation
- Flies: One should cover the food and try to control the flies
- Fields: One should wash the vegetables and fruits before using them. One should avoid defecating in the open.
- Floods: cities should have proper and well-maintained drainage system and water treatment plants.
Q.2) How do infectious diseases spread?
Ans.1.) Many microbial organisms can easily spread from one person to another in a number of ways.
2.) These are known as communicable diseases. examples of such Microbes are those that cause disease that can spread through the air.
3.) This happens when an infected individual sneezes or coughs and releases little droplets.
4.) The microorganisms have an opportunity to develop a new infection if someone close by breathes in these droplets.
5.) The common cold, pneumonia, and tuberculosis are examples of diseases transmitted by air.6.) The more crowded our living arrangements get, the more likely it is that diseases spread through the air.
7.) Diseases can also be transmitted by water. This happens when the fecal matter of someone with an infectious gut condition, such as cholera, interact with the drinking water used by adjacent residents.
8.) Microbial illnesses such as syphilis and AIDS, for example, are spread from one partner to the other through sexual contact.
9.) Apart from that, the most common vectors we are all familiar with are mosquitoes, which can also transmit disease.