Respiratory System and Composition of Air

Which of the following is not a function of the respiratory system?

• Inspiration

• Gaseous exchange

• Blood Transportation

• Expiration

What is the name of the pipe which carried air down from the mouth and nose?

• Bronchi

• Trachea

• Bronchioles

• Hose pipe

During inspiration the diaphragm ______________ and to make more space in the chest so the lungs can expand to pull in the air.

During expiration the diaphragm relaxes and returns to a dome shape, making the chest cavity _________. This helps force air out of the lungs

Where does gaseous exchange take place?

• Bronchi

• Alveoli

• diaphragm

• Mouth

Inhaled air consists of what percentage of oxygen?

• 11%

• 21%

• 31%

• 41%

Exhaled air consists of what percentage of oxygen?

• 6%

• 16%

• 26%

• 36%

Which gas makes up the largest percentage of the air.

• Nitrogen

• Oxygen

• Carbon Dioxide