Page 1: Probe and Ponder
Q1: How does your body respond to an infection such as common cold? A: The immune system detects the virus. It raises body temperature (fever) to kill germs, produces mucus to trap them (runny nose), and induces coughing/sneezing to expel them.
Q2: We rarely see smallpox/polio, but diabetes is common. Why? A: Smallpox and Polio are communicable diseases controlled by Vaccines. Diabetes is a non-communicable lifestyle disease caused by poor diet and lack of exercise, which are becoming more common in modern life.
Q3: Could climate change lead to new types of diseases? A: Yes. Warmer temperatures allow vectors like mosquitoes to survive in new areas, spreading diseases like Dengue and Malaria to regions that were previously too cold for them.
Q4: How do emotions like stress affect us? A: Stress releases hormones that can suppress the immune system, making us more susceptible to infections. It can also lead to headaches, insomnia, and high blood pressure.
Page 15: Keep the Curiosity Alive
Task: Group the diseases shown in images as communicable or non-communicable.
- Cold and Flu: Communicable (Viral).
- Typhoid: Communicable (Bacterial - Waterborne).
- Diabetes: Non-communicable (Lifestyle/Hormonal).
- Asthma: Non-communicable (Allergy/Environment).
- Chickenpox: Communicable (Viral).