Formative Practice 11.2 (Form 4 Biology Textbook Exercise and Answer)


Question 1:
What are the types of immunity that decrease according to time? Explain why.

Answer:
Artificial passive immunity. The body does not produce its own antibody; therefore, the immunity does not last long and only provides a temporary protection.


Question 2:
Propose immediate treatment that can be given to someone who has been bitten by a poisonous snake.

Answer:
An antiserum injection against snake venom provides immediate protection but only for a short term. The immunity is acquired immediately after the injection.


Question 3:
State one difference between artificial passive immunity and artificial active immunity.

Answer:
The period of immunity for artificial passive immunity is shorter than that of artificial active immunity.


Question 4:
In your opinion, why must we follow and complete the immunisation plan in Malaysia?

Answer:
Immunisation helps to boost the immune system by stimulating the body’s defence cells which then protect us from any possibility of life-threatening complications. Therefore, we are advised to comply with and complete the immunisation plan as early as possible according to the recommended schedule.

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