Gaseous Exchange

Question 1

Breathing

Answer 1

The muscular mechanism to transport air containing oxygen from the atmosphere to the lungs and CO2 from the lungs to the atmosphere

Question 2

Respiration

Answer 2

The biochemical process in which cells of an organism obtain energy by combining oxygen and glucose, resulting in the release of carbon dioxide, water and energy

Question 3

Explain the effects of physical activity on the rate and depth of breathing

Answer 3

When you run you need MORE energy MORE oxygen is needed to release energy
You breath deeper and faster to MORE oxygen into your blood and you heart beats faster to get oxygen to the muscles

Question 4

Effects of Nicotine

Answer 4

Reduces diameter of arterioles
Hypertension
Damages endothelium of blood vessels
Cholesterol
Thrombosis
Addictive

Question 5

Effects of Carbon monoxide

Answer 5

Combines with haemoglobin
Reduces oxygen transportation
Cells respire less
Damage lining of arteries
CO poisioning

Question 6

Effects of Tar

Answer 6

Irritant to mucus membrane
Cancer
Over-secretion of mucus
Damages cilia

Question 7

Tabaco smoking can cause Chronic obstructive pulmonary disease (COPD)

Answer 7

Emphysema
Chronic bronchitis

Question 8

Emphysema

Answer 8

Damage to elastic fibres causes alveoli to burst- less surface area

Question 9

Chronic bronchitis

Answer 9

inflammation and excess mucus build up inside airways0 narrows the airway