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.

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.

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.

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?

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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