Aids to Health Short Answer Biology Class-9 ICSE Selina Publishers Solutions Chapter-17. Step By Step ICSE Selina Concise Solutions of Chapter-17 Aids to Health with Exercise-17 including MCQs, Very Short Answer Type, Short Answer Type, Long Answer Type and Structured/Application Questions Solved . Visit official Website CISCE for detail information about ICSE Board Class-9.
Aids to Health Exe-17 Short Answer Biology Class-9 ICSE Concise Selina Publishers
| Board | ICSE |
| Publications | Selina Publication |
| Subject | Biology |
| Class | 9th |
| Chapter-17 | Aids to Health |
| Book Name | Concise |
| Topics | Solution of C. Short Answer Type |
| Academic Session | 2023-2024 |
C. Short Answer Type
Aids to Health Class-9 Biology Concise Solutions
Page 186
Question 1.
Define the terms:
(a) Immunity
(b) Antibodies
(c) Prophylaxis
(d) Vaccine
(e) Immunisation
Answer:
(a) Immunity is the resistance to the onset of a disease after infection by harmful germs.
(b) Antibodies are special types of proteins that are present in our body or are formed in response to any infection or toxin.
(c) Prophylaxis is the prevention of disease through vaccines, medications, hygiene practices, lifestyle changes, and other strategies to reduce the risk and impact of illness.
(d) Vaccine is a biological formulation that consist of dead or weakened disease causing organism that provides active acquired immunity to a particular infectious disease.
(e) Developing resistance to disease-producing germs or their toxins by introducing killed germs or germ substances to induce the production of specific antibodies.
Question 2.
Correct the following statements by changing the first/last word only:
(a) Lysol is an antibiotic.
(b) The treatment of diseases by the use of chemical substances is known as allopathy.
(c) RBCs are germ-fighting cells of our body.
(d) Antiseptics are the proteins that belong to the class of immunoglobulins.
(e) BCG vaccines are given to small babies orally.
Answer:
(a) Lysol is an antiseptic.
(b) The treatment of diseases by the use of chemical substances is known as chemotherapy.
(c) WBCs are germ-fighting cells of our body.
(d) Antibodies are the proteins that belong to the class of immunoglobulins.
(e) BCG vaccines are given to small babies intra-dermal.
Question 3.
Given below is a table of certain vaccines, the diseases against which they are used and the nature of vaccine. Fill up the gaps 1-10.
| Vaccine | Disease | The Nature of Vaccine |
| TAB | 1. ___ | 2. __ |
| Salk’s vaccine | 3. __ | 4. __ |
| BCG | 5. __ | Living weakened germs |
| Vaccines for measles | Measles | 6. ___ |
| Cowpox virus | 7. __ | 8. __ |
| Toxoids | 9. __ | Extracts of toxins |
| 10. __ | Secreted by bacteria |
Answer:
| Vaccine | Disease(s) | The Nature of Vaccine |
| TAB | 1. Typhoid |
2. Killed germs |
| Salk’s Vaccine | 3. Poliomyelitis |
4 . Killed germs |
| BCG | 5. Tuberculosis |
Living weakened germs |
| Vaccines for Measles | Measles | 6. Living weakened germs |
| Cowpox Virus | 7. Small pox |
8. Living fully poisonous germs |
| Toxoids | 9. Diphtheria |
Extracts of toxins |
| 10. Tetanus |
Secreted by bacteria |
Question 4.
Given below is a scheme of classifying immunity against human diseases. Fill up the types of immunity in the blanks 1-9.
Answer:
(1) Innate immunity
(2) Acquired immunity
(3) Specific immunity
(4) Active acquired immunity
(5) Passive acquired immunity
(6) Natural acquired active immunity
(7) Artificial acquired active immunity
(8) Natural acquired passive immunity
(9) Artificial acquired passive immunity
C. Short Answer Type
Aids to Health Class-9 Biology Concise Solutions
Page 187
Question 5.
Choose the odd one out and write the category for the remaining terms.
(a) Carbolic acid, Formalin, Benzoic acid, Boric acid
(b) Mercurochrome, Cresol, Phenol, Bordeaux mixture
(c) ATP, DPT, BCG, TAB
(d) Saliva, Sweat, Skin, Tears
(e) Chloromycetin, Streptomyces, Streptomycin, Aureomycin
Answer:
(a) Odd one out: Formalin (disinfectant)
Carbolic acid, Benzoic acid, Boric acid — antiseptic
(b) Odd one out: Mercurochrome (antiseptic)
Cresol, Phenol, Bordeaux mixture — disinfectant
(c) Odd one out: ATP (energy providing compound formed during respiration)
DPT, BCG, TAB — Vaccine
(d) Odd one out: Skin
Saliva, Sweat, Tears — germ killing secretions
(e) Odd one out: Streptomyces (bacterium)
Chloromycetin, Streptomycin, Aureomycin — antibiotics
Question 6.
List any four ways in which the antibiotics are being used.
Answer:
- Antibiotics have a wide use in medicine to fight infections.
- Certain antibiotics are used as food preservatives, especially for fresh meat and fish.
- Some antibiotics are used in treating animal feed to prevent internal infection.
- Some antibiotics are used for controlling plant pathogens.
Question 7.
List the merits of local defence systems.
Answer:
Merits of local defence systems:
- Local defence systems start working instantaneously.
- These systems are not dependent on previous exposure to infections.
- They are effective against a wide range of potentially infectious agents.
— : End of Aids to Health C. Short Answer Class-9 ICSE Biology Solutions :–
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