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Class Ix Biology Why Do We Fall Ill? Assignment 5

This document contains an assignment on infectious diseases and the immune system for a Class IX biology class. It includes 15 points on topics like preventing disease through public health measures and immunization. The assignment asks students to answer 6 questions related to these topics, including naming bacteria that cause acne, defining the immune system, and justifying why preventing disease is better than treating it. Students are instructed to send their assignment responses to specific email addresses depending on whether their class is in the morning or afternoon.

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Madhusudan Banerjee
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79 views4 pages

Class Ix Biology Why Do We Fall Ill? Assignment 5

This document contains an assignment on infectious diseases and the immune system for a Class IX biology class. It includes 15 points on topics like preventing disease through public health measures and immunization. The assignment asks students to answer 6 questions related to these topics, including naming bacteria that cause acne, defining the immune system, and justifying why preventing disease is better than treating it. Students are instructed to send their assignment responses to specific email addresses depending on whether their class is in the morning or afternoon.

Uploaded by

Madhusudan Banerjee
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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CLASS IX

BIOLOGY
WHY DO WE FALL ILL?
ASSIGNMENT 5

GIST OF THE LESSON:


1. Prevention of a disease is more desirable than its successful
treatment.

2. Infectious diseases can be prevented by public health hygiene


measures that reduce exposure to infectious agents.

3. Infectious diseases can also be prevented by using immunisation.

4. Our immune system has cells that specialize in killing infecting


microbes.

5. Lack of success of the immune system leads to the development


of severe infectious diseases.

6. The functioning of immune system will depend on availability of


proper and sufficient nourishment and food.

7. Antigens are substances that activate an immune response.

8. Antigens trigger the production of specific antibodies by the


immune system cells.

9. Antibodies react with the specific antigens to render them


harmless.

10. Acquired immunity in humans is of two types: active and passive.

11. Vaccination is the injection of a killed microbe in order to


stimulate the immune system against the microbe, thereby
preventing the disease.
12. Edward Jenner discovered the first vaccine. (Latin for ’cow’ is
‘vacca’ and cowpox is ‘vaccinia’)

13. Small pox was eradicated worldwide by a collaborative global


vaccination program led by WHO.

14. Nowadays, vaccines are available against diptheria, whooping


cough, tetanus, measles, polio, tuberculosis, hepatitis and other
infectious diseases.

15. Majority of children in rural India get naturally immune to


hepatitis A by five years of age as they are exposed to the virus
through water.

ASSIGNMENT
WEEK 5

Q1.A) Ascaris lumbricoides is common roundworm of:


i) liver
ii) small intestine
iii) large intestine
iv) bile duct
B) You are aware of the Polio Eradication Programme .Children are
vaccinated because:
i) vaccination kills polio causing microorganism.
ii) prevents entry of polio causing pathogen.
iv) it creates immunity in the body.
v) all of the above.
Q2.Name:
A) The bacteria causing acne.
B) The system in our body which is activated in response to an infection.
Q3. “Prevention of a disease is more desirable than its treatment”. Justify the
statement.
Q4. Discuss in brief the principle of immunisation.
Q5. What may be the symptoms of a disease if the following organs are
infected:
A) Lungs
B) Brain
Q6.It has been observed that despite the availability of the vaccine for
hepatitis A in the market, it may not be necessary to be given to children by
the time they are five years of age. Why?

Send the assignment of Biology to the respective e mail IDs as mentioned below:
Morning E Mail ID Afternoon E Mail ID
A keyabhatt2020@gmail.com A tuhinroy1980@yahoo.com

B chetterjeeshilpa@gmail.com B prithasingh22@gmail.com

C chetterjeeshilpa@gmail.com C dasguptamadhurima010@gmail.com

D paromitamukh2311@gmail.com D ps2assignmentsphs@gmail.com

E roy.bratati2020@gmail.com E romiauntysphs@gmail.com

F gdey1963@gmail.com F payel.sphs@gmail.com

G shubhradutt.sphs@gmail.com G shampadasgupta27@gmail.com

H arnab.biswas2503@gmail.com H sds.1706@gmail.com

Note for Students:


We are asking you to submit the assignment through the app also in order to enable you to try it out
and get comfortable with that feature

DATE OF ASSIGNMENT: 06.06.2020

DUE DATE: 13.06.2020

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