Aids to Health Short Answer Biology Class-9 ICSE Selina Publishers

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.

imunity table for Chapter-17 Selina Biology Solutions

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 :–

Return to  Return to Concise Selina ICSE Biology Class-9 

Thanks

Please share with your friends

Leave a Comment

This site uses Akismet to reduce spam. Learn how your comment data is processed.