Factors affecting human healthIB MYP Biology: Mind map

Exam questions on Factors affecting human health

1. A health clinic in Cairo records the illnesses of its patients during one week. A group of children who attend the same nursery all have measles, which spread from one child to the others. Separately, several adults have coronary heart disease, and none of them caught it from another person.
   Describe two differences between communicable and non-communicable diseases.2 marks
2. Sipho is 15 and lives in Johannesburg. He drinks several sugary drinks a day, often eats fried food, and spends most evenings sitting at a screen. His doctor measures his body mass and finds that he is well above the healthy range. The doctor warns him that he is at risk of serious illness later in life.
   Explain how regular exercise could reduce Sipho's risk of developing type 2 diabetes.2 marks
3. A man in Jakarta is 52. He has smoked 20 cigarettes a day for 30 years. He is now breathless when he climbs stairs and he coughs every morning. His doctor tells him that tobacco smoke contains tar, nicotine and carbon monoxide, and that he is at risk of lung disease and coronary heart disease.
   Describe how tobacco smoke damages the gas exchange system.3 marks