What is the primary function of the lungs?

• To produce mucus

• To facilitate gas exchange

• To pump blood

• To digest food

What role does the diaphragm play during inhalation?

• It filters the air

• It remains stationary

• It contracts to pull air in

• It expands to push air out

What prevents food from entering the nasopharynx during eating?

• The larynx

• The trachea

• The uvula

• The epiglottis

Which bronchus is more likely to get a foreign object lodged in it?

• The left mainstem bronchus

• The right mainstem bronchus

• The laryngopharynx

• The trachea

What is the function of the autonomic nervous system in the respiratory system?

• To digest food

• To control the diameter of airways

• To regulate the heartbeat

• To produce mucus

What is the role of ciliated columnar cells in the respiratory system?

• To warm the air

• To produce surfactant

• To exchange gases

• To move mucus and trapped particles

What is the primary function of alveoli in the lungs?

• To produce mucus

• To warm the air

• To facilitate gas exchange

• To trap particles

Tags

NGSS.HS-LS2-5

What is the final destination of inhaled air before gas exchange occurs?

• The alveolar duct

• The trachea

• The nasal cavity

• The bronchioles

What substance do type II pneumocytes secrete?

• Glycosaminoglycans

• Surfactant

• Lysozyme

• Mucus

How does the body prevent tiny particles from damaging the lungs?

• By alveolar macrophages

• By trapping them in mucus

• By coughing them up

• By using the mucociliary escalator