Diseases and First Aid ICSE Class-8th Concise Selina Biology
Diseases and First Aid ICSE Class-8th Concise Selina Biology Solutions Chapter-8 . We Provide Step by Step Answer of MCQs , Objective, True False , Fill in the blanks , Match the following , Short /Long Answer Type of Exercise-8 Diseases and First Aid . Visit official Website CISCE for detail information about ICSE Board Class-8.
Diseases and First Aid ICSE Class-8th Concise Selina Biology Solutions Chapter-8
REVIEW QUESTIONS Diseases and First Aid ICSE Class-8th
Multiple Choice questions:
1. Put a tick mark (✓) against the correct alternative in the following statements:
(a) A mosquito is a vector for
(b) Dengue is caused by a
(c) The idea of vaccination was conceived by
- Charles Darwin
- Alexander Flemming
- Issac Newton
- Edward Jenner
(d) Which one of the following is not a psychotropic drug ?
(e) Which one of the following is a communicable disease ?
- Heart stroke
(f) Cataract is a disease of: –
(g) Infectious diseases can be prevented by:
- Proper food
(h) Which one of the following is a genetic disease ?
(i) Which one of the following is a degenerative disease ?
(j) Pellagra is one disease caused by the deficiency of:
- Vit. B3
- Vit. B1
- Vit. C
- Vit. D
(k) Hay fever and asthma are
- Deficiency diseases
- Genetic diseases
- Organic diseases
- Allergy diseases
(I) Which one of the following vitamin deficiency diseases can be cured by eating a diet which includes carrot, yellow fruits, vegetables, butter, milk, fish ?
- Night blindness
Short Answer Questions: Diseases and First Aid ICSE Class-8th
What is a non-communicable disease ?
The diseases which are caused due to improper functioning of the body organs e.g. diabetes, heart attack. They are not caused by germs and not transmitted from one to another.
What are communicable diseases ?
Those disease which spread from one person to another by the entry of microorganisms are known as communicable diseases
How can we control spreading of diseases by mosquitoes and houseflies ?
We can control spreading of diseases by mosquitoes and houseflies by using repellants, throwing garbage in covered bins, avoiding stagnation of water and checking breeding of these insects.
Public hygiene is equally important as personal hygiene. Give reasons.
Keeping oneself clean is personal hygiene. But public hygiene is equally important as dirty surrounding may lead to more of houseflies, mosquitoes and other insects which are major vectors of many communicable diseases. Clean surrounding also provides good mental health as it soothes our mind.
What is a deficiency disease ?
These disease are caused by lack of nutrients, vitamins, minerals as a anaemia, goitre.
Biting nails should be strictly avoided. Give reason.
Nail biting may cause many disease as the dirt has many bacteria causing diseases. Nails should be cut from time to time to save from diseases.
Regular exercise and proper rest is a must. Give reason.
Regular exercise keeps our body strong and immune to many diseases, rest refreshes our body.
Children eating more of fast food tend to suffer from obesity (overweight). Comment.
Fast food like pizza, burger, patty, oily foods etc. have much carbohydrates and fats. Children eating these become more and more fat and gain weight soon as they do not do much of physical work.
2. Name the following: Diseases and First Aid ICSE Class-8th
A viral disease caused due to unhealthy sexual contact
A disease caused due to Plasmodium
A disease caused by the bite of female Anopheles mosquito
Two viral diseases caused by mosquito bites
Any droplet — borne disease.
Amoebiasis, Cholera, Hepatitis A.
A viral disease caused by the bite of a dog
A disease due to choking of coronary artery
Two diseases caused due to deficiency of protein in the diet of a child.
Kwashiorkor and marasmus.
3. Write short (2-3 sentences) notes on the following:
Disease, Immunisation, Pathogen, AIDS, Vaccination, Vector.
Disease is a departure from normal health due to structural or functional disorder of the body. They may be due to deficiency of nutrients or malfunctioning of organs or 1 genetic disorders, improper metabolic activity, or allergies, or cancer and mental illness as diabetes, haemophilia, leukemia, schizophrenia.
It means, we make the body immune to certain diseases by introducing respective weakened germs into the body. Thus we develop resistance to the concerned disease this process is called immunisation. The germs or the material introduced into the body to make it resistant to the concerned disease is called vaccine. This produces antibodies in the body of the person and the person can be saved by these antibodies. The vaccine can be given by the injection or orally as polio drops, tap vaccine for typhoid, BCG vaccine for tuberculosis.
The germs that cause diseases to human beings and to other animals and plants are called pathogens. They spread the diseases from person to person or through the air or through the articles of the diseased persons. Pathogens may be different kinds of bacteria, viruses, fungi, protozoans or worms.
AID’S (Acquired Immune Deficiency Syndrome):
It is a viral disease caused by the virus called HIV (Human immuno deficiency virus) This virus makes the defence mechanism of the human body very weak. The immune system in the body as W.B.C. becomes weak. Thus the person catches the infectious diseases very easily. This disease spreads through sexual contact as one of the partner may be carrier of the disease. It may spread through the blood transfusion and infected syringes, blades of the barbers, it may infect the developing baby through the blood by the mother. It is very deadly disease.
Vaccination is a method of making the body immune to a particular disease by injecting killed or weakened disease causing microbe into a body to stimulate the formation of antibodies and develop immunity to that disease causing microbe.
Vector: A vector is an organism that carries disease causing microbes (pathogens) from one host to another. They are the carriers of infection. Example: Mosquito, housefly, etc.
Fill in the blanks by selecting suitable words given below:
(clotting, goitre, insuline, rickets, iron, proteins)