Chapter 5: The Respiratory System — Multiple Choice Quiz

Which of the following correctly describes the primary function of the respiratory system?

• To produce energy in muscle cells

• To transport blood through the body

• To digest nutrients

• To supply oxygen to the body and remove carbon dioxide

Which structures are responsible for gas exchange within the lungs?

• Trachea and bronchi

• Pharynx and larynx

• Bronchioles and alveoli

• Nose and mouth

What is the movement of air into and out of the lungs called?

• Ventilation

• Respiration

• Diffusion

• Osmosis

Which muscle contracts during inspiration to increase the chest cavity volume?

• Abdominals

• Pectorals

• Diaphragm

• Biceps

During expiration, the diaphragm:

• Contracts and flattens

• Relaxes and moves upwards

• Remains stationary

• Contracts and moves downwards

What is the name of the tiny air sacs where oxygen and carbon dioxide are exchanged?

• Alveoli

• Bronchi

• Cilia

• Capillaries

Gaseous exchange occurs because gases move:

The equation for ventilation is:

• TV × HR

• RR × TV

• HR × SV

• VO2 × CO

Which part of the brain controls breathing?

• Frontal lobe

• Brain stem

• Cerebellum

• Cerebrum

At rest, an average person breathes about:

• 6 breaths per minute

• 12 breaths per minute

• 20 breaths per minute

• 30 breaths per minute