Respiratory System Quiz

What is the primary function of the lungs?

• To filter waste

• To exchange gases

• To digest food

• To pump blood

Which part of the respiratory system is involved in gas exchange?

• Conducting zone

• Respiratory zone

• Upper respiratory tract

• Nasal cavity

How many lobes does the right lung have?

• One

• Two

• Three

• Four

What is the functional unit of the lung called?

• Lobule

• Acinus

• Bronchiole

• Alveolus

What is the role of elastic fibers in the alveoli?

• To produce mucus

• To provide blood supply

• To filter air

• To expand on inhalation

What type of blood does the pulmonary circulation bring to the lungs?

• Waste-rich

• Nutrient-rich

• Deoxygenated

• Oxygenated

What structure helps the lungs expand during breathing?

• Heart

• Diaphragm

• Liver

• Stomach

What is the volume of air remaining in the lungs after exhalation called?

• Functional residual capacity

• Residual volume

• Tidal volume

• Total lung capacity

What is the function of the pleural fluid?

• To produce hormones

• To digest food

• To lubricate the lungs

• To pump blood

What is the role of the pleural sac?

• To produce blood cells

• To store oxygen

• To reduce friction

• To divide the heart