Selina solutions concise biology class 8 icse Solutions for Chapter 8 disease and first aid

Q1) What is Vaccination ? Mention the four ways in which vaccine's are prepared, giving the name of one disease for which each type of vaccine is used.

Q2) Burns can be superficial burns, deep burns or chemical burns. What emergency care you would care you would suggest in each case.

Q3) Describe the ways in which communicable diseases are transmitted through various indirect methods.

Q4) Given a crossword puzzle. Read the clues across and clues downward, and fill up the blank squares. Check up your performance with the correct solution given at the end.

Clues across

1. Category of pathogen that causes diseases, like common cold and mumps.
2. These may readily grow in your hair, if you do not wash it regularly.
3. This is the vaccine for preventing tuberculosis.
4. Cover this part of your body by a hankerchief while sneezing to prevent droplet infection to others.
5. The disease pertussis is popularly known as whooping.
6. One of the most common insects which visits our exposed foods and contaminates them.
7. A disease that weakens body"s defence system against infections.

Clues down

8. Germ or germ- substance introduced into thr body to prevent occurrence of an infectious disease.
9. A disease in which the eyes, the skin and the urine turn yellow.
10. An organ usually affected by Tuberculosis.
11. A disease caused by th bite of an infected dog, and which affects the central nervous system.

Q1) 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 attack

4. Allergy

(f) Cataract is a disease of :

1. Ears

2. Nose

3. Eyes

4. Throat

(g) Infectious disease can be prevented by:

1. Medicine

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 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. Vitamin B3

2. Vitamin B1

3. Vitamin C

4. Vitamin D

(k) Hay fever and asthma are

1. Deficiency disease

2. Genetic disease

3. Organic disease

4. Allergy disease

(l) 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

Q1)

(a) What is a non-communicable disease ?

(b) What are coommunicable diseases ?

(c) How can we control spreading of diseases by mosquitoes and houseflies ?

(d) Public hygiene is equally important as personal hygiene. Give reasons.

(e) What is a deficiency disease ?

(f) Biting nails should be strictly avoided. Give reason.

(g) Regular exercise and proper rest is a must. Give reason.

(h) Children eating more of fast food tend to suffer from obedity (overweight). Comment

Q2) Name the following:

(a) A viral disease caused due to unhealthy sexual contact.

(b) A disease caused due to Plasmodium.

(c) A disease caused by the bite of female Anopheles mosquito.

(d) Two viral diseases caused by mosquito bites.

(e) Any droplet-borne disease.

(f) A viral disease caused by the bite of a dog.

(g) A disease due to choking of coronary artery

(h) Two diseases caued due to deficiency of protein in the diet of a child.

Q3) Write short notes on the following :

Disease , Immunisation, Pathogen, AIDS, Vaccination, Vector.

Practice Question :

Fill in the blanks by selecting suitable words given below :

(clotting, goitre, insuline, rickets, iron, proteins)

(a) Anaemia is caused due to deficiency of __________.

(b) Deficiency of Vit.D causes __________.

(c) Deficiency of iodine in the diet may cause __________.

(d) Diabetes is caused due to under secretion of __________.

(e) Kwashiorkor is caused due to the deficiency of __________.

(f) Haemophilia is a disease caused due to slow__________ of blood.

Practice Question :

Find the odd one out :

(a) Typhoid, cholera, jaundice, tuberculosis, tetanus.

(b) Cold, AIDS, plague, malaria, measles.

(c) Scurvy , rickets, haemophilia, pellagra, night blindness.

(d) Proteins, carbohydrates, fats, minerals, cancer.

Practice Question:

Fill in the blank in the following table :