Respiratory System Multiple Choice Questions

Which structure is the primary site of gas exchange?

• Trachea

• Bronchi

• Alveoli

• Pleura

What structure prevents food from entering the respiratory tract during swallowing?

• Uvula

• Epiglottis

• Pharynx

• Larynx

Which part of the respiratory tract is also called the “voice box”?

• Pharynx

• Larynx

• Trachea

• Bronchi

The trachea branches into two primary:

• Alveoli

• Bronchi

• Pleural sacs

• Capillaries

Which respiratory structure is surrounded by cartilage rings to keep it open?

• Trachea

• Alveoli

• Bronchioles

• Pleura

The diaphragm is important in breathing because it:

• Produces mucus

• Pumps oxygen into blood

• Contracts to enlarge the thoracic cavity

• Filters dust particles

Which muscle group assists the diaphragm during forced inhalation?

• Intercostal muscles

• Abdominal muscles

• Gluteal muscles

• Pectoral muscles

Which respiratory structure warms, moistens, and filters air?

• Nose

• Lungs

• Bronchioles

• Diaphragm

Which of the following is considered an upper respiratory structure?

• Trachea

• Larynx

• Bronchi

• Pharynx

Which pleural layer directly covers the lungs?

• Parietal pleura

• Visceral pleura

• Pericardium

• Diaphragmatic pleura