Activities

Activity 1: Mapping the Life Cycle of Plasmodium

Aim: To understand the complex life cycle of the malarial parasite and the role of its two hosts.

Procedure:

1. Study Figure 7.1 in the textbook carefully.
2. Draw a flowchart representing the cycle.
3. Label the following stages:
   • Sporozoites (infectious stage) entering the human body.
   • Asexual reproduction in liver cells and RBCs.
   • Release of haemozoin (causing fever).
   • Formation of gametocytes in human blood.
   • Bite of female Anopheles mosquito and transfer of gametocytes.
   • Fertilisation and development in the mosquito's gut.
   • Migration of sporozoites to the salivary glands of the mosquito.

Conclusion: The malarial parasite requires both human and mosquito hosts to complete its sexual and asexual phases.

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Activity 2: Community Health Survey

Aim: To assess the awareness of public hygiene and vector control in your residential area.

Procedure:

1. Prepare a checklist for local observations:
   • Presence of stagnant water (potential mosquito breeding grounds).
   • Frequency of garbage collection and disposal.
   • Hygiene practices in local food stalls/markets.
   • Usage of mosquito nets or wire meshes in houses.
2. Interview 5–10 households about their awareness of water-borne (e.g., typhoid) and vector-borne (e.g., dengue) diseases.
3. Discuss your findings in class and suggest improvement measures.

Observation: Community awareness and public hygiene are directly linked to the incidence of infectious diseases.

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Activity 3: Investigation into Allergies

Aim: To identify common allergens and understand the physiological response.

Procedure:

1. Conduct a survey among your classmates to find out if anyone suffers from allergies (e.g., to dust, pollen, certain foods, or animal dander).
2. List the common symptoms reported (e.g., sneezing, watery eyes).
3. Research the role of mast cells, histamine, and IgE antibodies in an allergic reaction.
4. Identify the common medications used to provide relief (e.g., anti-histamines).

Conclusion: Allergy is an exaggerated immune response, and prevention primarily involves avoiding contact with known allergens.

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Activity 4: Anti-Drug Awareness Campaign

Aim: To design effective communication materials to educate peers about the dangers of drug and alcohol abuse.

Procedure:

1. Form groups and select a specific topic:
   • Impact of smoking on the lungs and heart.
   • Dangers of intravenous drug use (HIV/Hepatitis B risk).
   • Withdrawal symptoms and dependence.
   • Stress management as an alternative to substance use.
2. Create posters, slogans, or short skits to convey the message: "Don't die of ignorance" or "Say No to Drugs".
3. Present your materials in a school assembly or exhibition.

Conclusion: Education and peer support are vital in protecting adolescents from the "vicious circle" of addiction.