6.4 Gas Exchange

Question 1

How does smoking cause lung cancer?

Answer 1

tobacco smoke contains many mutagens that cause tumours to develop

Question 2

How does passive smoking cause lung cancer?

Answer 2

exhaled breath from smokers passes carcinogens to others

Question 3

How does air pollution cause lung cancer?

Answer 3

Many sources like diesel exhaust fumes, nitrogen oxides from vehicles, smoke from wood/coal fires

Question 4

How does radon gas cause lung cancer?

Answer 4

in some areas it leaks out of rocks, especially granite but also constructions, exposure is bad

Question 5

How does asbestos and silica cause lung cancer?

Answer 5

dust from these materials cause cancer if deposited in lungs