Upper and Lower Respiratory Tract Quiz

Which of the following structures is part of the upper respiratory tract?

• Trachea

• Nasal cavity

• Bronchioles

• Alveoli

What is the primary function of the alveoli in the lower respiratory tract?

• Producing mucus

• Gas exchange

• Filtering dust

• Warming air

Which of the following is NOT a component of the upper respiratory tract?

• Larynx

• Pharynx

• Nasal cavity

• Alveoli

Which structure connects the pharynx to the trachea?

• Larynx

• Bronchi

• Alveoli

• Nasal cavity

What is the main function of the trachea in the lower respiratory tract?

• Gas exchange

• Air passage to the lungs

• Producing sound

• Filtering blood

Which of the following best describes the role of the bronchi in the lower respiratory tract?

• They filter dust from inhaled air.

• They conduct air from the trachea to the lungs.

• They produce surfactant.

• They exchange gases with blood.

Explain how the structure of the nasal cavity supports its function in the upper respiratory tract.

• The nasal cavity is lined with cilia and mucus to trap particles and moisten air.

• The nasal cavity is made of cartilage to support breathing.

• The nasal cavity contains alveoli for gas exchange.

• The nasal cavity produces surfactant to reduce surface tension.

Which process occurs as air passes through the pharynx in the upper respiratory tract?

• Gas exchange with blood

• Air is warmed, moistened, and directed toward the larynx

• Oxygen binds to hemoglobin

• Surfactant is produced

Which of the following best explains the function of the lower respiratory tract in maintaining homeostasis?

• It filters and humidifies air.

• It provides a site for gas exchange, regulating oxygen and carbon dioxide levels in the blood.

• It produces sound for communication.

• It traps pathogens in mucus.

A person inhales air containing a high concentration of dust particles. Explain how the upper respiratory tract responds to protect the lower respiratory tract.

• The alveoli increase gas exchange.

• The nasal cavity and pharynx trap particles with mucus and cilia, preventing them from reaching the lungs.

• The trachea produces more surfactant.

• The bronchi constrict to block air flow.