Selina Textbook Solutions: Diseases and First Aid | Biology Class 8 ICSE PDF Download

 Page 1


Diseases and First Aid 
REVIEW QUESTIONS 
Multiple Choice questions: 
1. Put a tick mark (?) against the correct alternative in the following statements: 
(a) A mosquito is a vector for 
1. Typhoid 
2. Cholera 
3. Malaria 
4. Jaundice 
(b) Dengue is caused by a 
1. Protozoan 
2. Virus 
3. Worm 
4. Fungus 
(c) The idea of vaccination was conceived by 
1. Charles Darwin 
2. Alexander Flemming 
3. Issac Newton 
4. Edward Jenner 
(d) Which one of the following is not a psychotropic drug ? 
1. Morphine 
2. Cocaine 
3. Heroin 
4. Penicillin 
(e) Which one of the following is a communicable disease ? 
1. Measles 
2. Cancer 
3. Heart stroke 
4. Allergy 
Page 2


Diseases and First Aid 
REVIEW QUESTIONS 
Multiple Choice questions: 
1. Put a tick mark (?) against the correct alternative in the following statements: 
(a) A mosquito is a vector for 
1. Typhoid 
2. Cholera 
3. Malaria 
4. Jaundice 
(b) Dengue is caused by a 
1. Protozoan 
2. Virus 
3. Worm 
4. Fungus 
(c) The idea of vaccination was conceived by 
1. Charles Darwin 
2. Alexander Flemming 
3. Issac Newton 
4. Edward Jenner 
(d) Which one of the following is not a psychotropic drug ? 
1. Morphine 
2. Cocaine 
3. Heroin 
4. Penicillin 
(e) Which one of the following is a communicable disease ? 
1. Measles 
2. Cancer 
3. Heart stroke 
4. Allergy 
(f) Cataract is a disease of: – 
1. Ears 
2. Nose 
3. Eyes 
4. Throat 
(g) Infectious diseases can be prevented by: 
1. Medicines 
2. Proper food 
3. Immunisation 
4. Exercise 
(h) Which one of the following is a genetic disease ? 
1. Scurvy 
2. Leukemia 
3. Goitre 
4. Haemophilia 
(i) Which one of the following is a degenerative disease ? 
1. Thalassemia 
2. Beri-beri 
3. Cataract 
4. Diabetes 
(j) Pellagra is one disease caused by the deficiency of: 
1. Vit. B3 
2. Vit. B1 
3. Vit. C 
4. Vit. D 
(k) Hay fever and asthma are 
1. Deficiency diseases 
2. Genetic diseases 
3. Organic diseases 
4. Allergy diseases 
 
Page 3


Diseases and First Aid 
REVIEW QUESTIONS 
Multiple Choice questions: 
1. Put a tick mark (?) against the correct alternative in the following statements: 
(a) A mosquito is a vector for 
1. Typhoid 
2. Cholera 
3. Malaria 
4. Jaundice 
(b) Dengue is caused by a 
1. Protozoan 
2. Virus 
3. Worm 
4. Fungus 
(c) The idea of vaccination was conceived by 
1. Charles Darwin 
2. Alexander Flemming 
3. Issac Newton 
4. Edward Jenner 
(d) Which one of the following is not a psychotropic drug ? 
1. Morphine 
2. Cocaine 
3. Heroin 
4. Penicillin 
(e) Which one of the following is a communicable disease ? 
1. Measles 
2. Cancer 
3. Heart stroke 
4. Allergy 
(f) Cataract is a disease of: – 
1. Ears 
2. Nose 
3. Eyes 
4. Throat 
(g) Infectious diseases can be prevented by: 
1. Medicines 
2. Proper food 
3. Immunisation 
4. Exercise 
(h) Which one of the following is a genetic disease ? 
1. Scurvy 
2. Leukemia 
3. Goitre 
4. Haemophilia 
(i) Which one of the following is a degenerative disease ? 
1. Thalassemia 
2. Beri-beri 
3. Cataract 
4. Diabetes 
(j) Pellagra is one disease caused by the deficiency of: 
1. Vit. B3 
2. Vit. B1 
3. Vit. C 
4. Vit. D 
(k) Hay fever and asthma are 
1. Deficiency diseases 
2. Genetic diseases 
3. Organic diseases 
4. 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 ? 
1. Beri-beri 
2. Dermatitis 
3. Night blindness 
4. Scurvy 
Short Answer Questions: 
Question 1(a). 
What is a non-communicable disease ? 
Answer: 
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. 
Question 1(b). 
What are communicable diseases ? 
Answer: 
Those disease which spread from one person to another by the entry of microorganisms 
are known as communicable diseases. 
Question 1(c). 
How can we control spreading of diseases by mosquitoes and houseflies ? 
Answer: 
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. 
Question 1(d). 
Public hygiene is equally important as personal hygiene. Give reasons. 
Answer: 
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. 
Question 1(e). 
What is a deficiency disease ? 
Answer: 
These disease are caused by lack of nutrients, vitamins, minerals as a anaemia, goitre. 
Page 4


Diseases and First Aid 
REVIEW QUESTIONS 
Multiple Choice questions: 
1. Put a tick mark (?) against the correct alternative in the following statements: 
(a) A mosquito is a vector for 
1. Typhoid 
2. Cholera 
3. Malaria 
4. Jaundice 
(b) Dengue is caused by a 
1. Protozoan 
2. Virus 
3. Worm 
4. Fungus 
(c) The idea of vaccination was conceived by 
1. Charles Darwin 
2. Alexander Flemming 
3. Issac Newton 
4. Edward Jenner 
(d) Which one of the following is not a psychotropic drug ? 
1. Morphine 
2. Cocaine 
3. Heroin 
4. Penicillin 
(e) Which one of the following is a communicable disease ? 
1. Measles 
2. Cancer 
3. Heart stroke 
4. Allergy 
(f) Cataract is a disease of: – 
1. Ears 
2. Nose 
3. Eyes 
4. Throat 
(g) Infectious diseases can be prevented by: 
1. Medicines 
2. Proper food 
3. Immunisation 
4. Exercise 
(h) Which one of the following is a genetic disease ? 
1. Scurvy 
2. Leukemia 
3. Goitre 
4. Haemophilia 
(i) Which one of the following is a degenerative disease ? 
1. Thalassemia 
2. Beri-beri 
3. Cataract 
4. Diabetes 
(j) Pellagra is one disease caused by the deficiency of: 
1. Vit. B3 
2. Vit. B1 
3. Vit. C 
4. Vit. D 
(k) Hay fever and asthma are 
1. Deficiency diseases 
2. Genetic diseases 
3. Organic diseases 
4. 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 ? 
1. Beri-beri 
2. Dermatitis 
3. Night blindness 
4. Scurvy 
Short Answer Questions: 
Question 1(a). 
What is a non-communicable disease ? 
Answer: 
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. 
Question 1(b). 
What are communicable diseases ? 
Answer: 
Those disease which spread from one person to another by the entry of microorganisms 
are known as communicable diseases. 
Question 1(c). 
How can we control spreading of diseases by mosquitoes and houseflies ? 
Answer: 
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. 
Question 1(d). 
Public hygiene is equally important as personal hygiene. Give reasons. 
Answer: 
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. 
Question 1(e). 
What is a deficiency disease ? 
Answer: 
These disease are caused by lack of nutrients, vitamins, minerals as a anaemia, goitre. 
Question 1(f). 
Biting nails should be strictly avoided. Give reason. 
Answer: 
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. 
Question 1(g). 
Regular exercise and proper rest is a must. Give reason. 
Answer: 
Regular exercise keeps our body strong and immune to many diseases, rest refreshes 
our body. 
Question 1(h). 
Children eating more of fast food tend to suffer from obesity (overweight). Comment. 
Answer: 
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: 
Question 2(a). 
A viral disease caused due to unhealthy sexual contact 
Answer: 
AIDS. 
Question 2(b). 
A disease caused due to Plasmodium 
Answer: 
Malaria. 
Question 2(c). 
A disease caused by the bite of female Anopheles mosquito 
Answer: 
Malaria. 
Question 2(d). 
Two viral diseases caused by mosquito bites 
Answer: 
Dengu, Chikungunya. 
Question 2(e). 
Any droplet — borne disease. 
Page 5


Diseases and First Aid 
REVIEW QUESTIONS 
Multiple Choice questions: 
1. Put a tick mark (?) against the correct alternative in the following statements: 
(a) A mosquito is a vector for 
1. Typhoid 
2. Cholera 
3. Malaria 
4. Jaundice 
(b) Dengue is caused by a 
1. Protozoan 
2. Virus 
3. Worm 
4. Fungus 
(c) The idea of vaccination was conceived by 
1. Charles Darwin 
2. Alexander Flemming 
3. Issac Newton 
4. Edward Jenner 
(d) Which one of the following is not a psychotropic drug ? 
1. Morphine 
2. Cocaine 
3. Heroin 
4. Penicillin 
(e) Which one of the following is a communicable disease ? 
1. Measles 
2. Cancer 
3. Heart stroke 
4. Allergy 
(f) Cataract is a disease of: – 
1. Ears 
2. Nose 
3. Eyes 
4. Throat 
(g) Infectious diseases can be prevented by: 
1. Medicines 
2. Proper food 
3. Immunisation 
4. Exercise 
(h) Which one of the following is a genetic disease ? 
1. Scurvy 
2. Leukemia 
3. Goitre 
4. Haemophilia 
(i) Which one of the following is a degenerative disease ? 
1. Thalassemia 
2. Beri-beri 
3. Cataract 
4. Diabetes 
(j) Pellagra is one disease caused by the deficiency of: 
1. Vit. B3 
2. Vit. B1 
3. Vit. C 
4. Vit. D 
(k) Hay fever and asthma are 
1. Deficiency diseases 
2. Genetic diseases 
3. Organic diseases 
4. 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 ? 
1. Beri-beri 
2. Dermatitis 
3. Night blindness 
4. Scurvy 
Short Answer Questions: 
Question 1(a). 
What is a non-communicable disease ? 
Answer: 
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. 
Question 1(b). 
What are communicable diseases ? 
Answer: 
Those disease which spread from one person to another by the entry of microorganisms 
are known as communicable diseases. 
Question 1(c). 
How can we control spreading of diseases by mosquitoes and houseflies ? 
Answer: 
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. 
Question 1(d). 
Public hygiene is equally important as personal hygiene. Give reasons. 
Answer: 
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. 
Question 1(e). 
What is a deficiency disease ? 
Answer: 
These disease are caused by lack of nutrients, vitamins, minerals as a anaemia, goitre. 
Question 1(f). 
Biting nails should be strictly avoided. Give reason. 
Answer: 
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. 
Question 1(g). 
Regular exercise and proper rest is a must. Give reason. 
Answer: 
Regular exercise keeps our body strong and immune to many diseases, rest refreshes 
our body. 
Question 1(h). 
Children eating more of fast food tend to suffer from obesity (overweight). Comment. 
Answer: 
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: 
Question 2(a). 
A viral disease caused due to unhealthy sexual contact 
Answer: 
AIDS. 
Question 2(b). 
A disease caused due to Plasmodium 
Answer: 
Malaria. 
Question 2(c). 
A disease caused by the bite of female Anopheles mosquito 
Answer: 
Malaria. 
Question 2(d). 
Two viral diseases caused by mosquito bites 
Answer: 
Dengu, Chikungunya. 
Question 2(e). 
Any droplet — borne disease. 
Answer: 
Amoebiasis, Cholera, Hepatitis A. 
Question 2(f). 
A viral disease caused by the bite of a dog 
Answer: 
Rabies/Hydrophobia 
Question 2(g). 
A disease due to choking of coronary artery 
Answer: 
Atheraosclerosis. 
Question 2(h). 
Two diseases caused due to deficiency of protein in the diet of a child. 
Answer: 
Kwashiorkor and marasmus. 
3. Write short (2-3 sentences) notes on the following: 
Disease, immunisation, pathogen, AIDS, vaccination, vector. 
Answer: 
Disease: Disease is a departure from normal health due to structural or functional 
disorder of the body. Disease 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. 
Immunisation: 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. 
Pathogens: 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