Complete the following pathway of air into the body: (Suggest two)

1. Mouth

2. Trachea

3.

4.

5. Alveoli

• Alveolus

• Bronchi

• Bronchioles

• Windpipe

State the order of the pathway of air into the body.

• Mouth/nose. Bronchi. Bronchioles. Alveoli. Trachea

• Mouth/nose. Trachea. Bronchioles. Bronchi. Alveoli

• Mouth/nose. Trachea. Bronchi. Bronchioles. Alveoli

• Mouth/nose. Trachea. Alveoli. Bronchi. Bronchioles.

Where does the Gaseous exchange take place?

• Trachea

• Bronchi

• Bronchioles

• Alveoli

Suggest four characteristics of the Alveoli.

• One cell thick, allowing for diffusion to occur easily

• Surrounded by capillaries, which allows good blood supply

• Contains elastic fibres, allowing for an increase in surface area during inspiration

• Are small in size allowing for a large surface area for diffusion to take place

• Is located in the diaphragm

Answer explanation

Alveoli are small air sacs in the lungs where gaseous exchange occurs

When you are doing strenuous exercise, your body needs

• less oxygen

• more oxygen

• more carbon dioxide

• more lactic acid

Suggest what happens to a performers' breathing rate during exercise.

• Breathing rate increases

• Breathing rate decreases

• Breathing rate remains the same

Describe the Diaphragm.

• a muscular sheet at the base of the chest cavity

• the muscles between the ribs that raise and lower the ribs

• the muscles in the abdominals that support breathing

• the muscles in the lungs that allow for exhalation

Describe the intercostal muscles.

• a muscular sheet at the base of the chest cavity

• the muscles between the ribs that raise and lower the ribs

• the muscles in the abdominals that support breathing

• the muscles in the lungs that allow for exhalation

Suggest one thing that happens to the ribcage during Inhalation (breathing in).

• Moves outwards and upwards as the intercostal muscles contract and lengthen

• Moves inwards and downwards as intercostal muscles relax

• Contracts to become flatter

• Relaxes and domes upwards

Suggest one thing that happens to the ribcage during exhalation (breathing out).

• Moves outwards and upwards as the intercostal muscles contract and lengthen

• Moves inwards and downwards as intercostal muscles relax

• Contracts to become flatter

• Relaxes and domes upwards