Integrated Science

Question 1

1Compared with inhaled air, exhaled air contains

Easy

A. more carbon dioxide B. less nitrogen only C. more oxygen D. less water vapour

Question 2

2Alveoli are well suited for gaseous exchange because they have

Easy

A. thin walls and a large surface area B. thick walls C. few blood vessels D. a dry surface

Question 3

3During inhalation, the diaphragm

Easy

A. disappears B. contracts and flattens C. relaxes and domes upward D. moves into the chest

Question 4

4When we breathe in, the diaphragm

Easy

A. relaxes and domes upwards B. contracts and flattens C. stays still D. moves the ribs down

Question 5

5Carbon monoxide is dangerous because it

Hard

A. dissolves bones B. is very hot C. causes sneezing only D. binds to haemoglobin more strongly than oxygen

Question 6

6Gaseous exchange in the human lungs takes place in the

Easy

A. alveoli B. bronchi C. larynx D. trachea

Question 7

7The windpipe is also called the

Easy

A. oesophagus B. bronchiole C. larynx D. trachea

Question 8

8Inhaled air contains about what percentage of oxygen?

Easy

A. 78% B. 16% C. 0.04% D. 21%

Question 9

9Which disease mainly damages the alveoli and is strongly linked with smoking?

Easy

A. malaria B. emphysema C. cholera D. scurvy