Respiratory System Structure and Function

Which structure serves as the primary muscle of breathing and separates the thoracic and abdominal cavities?

• Larynx
• Diaphragm
• Trachea
• Bronchus

The exchange of gases between air and blood occurs primarily in the:

• Bronchioles
• Trachea
• Alveoli
• Pharynx

Which of the following is measured by pulse oximetry?

• Lung capacity
• Breathing rate
• Tidal volume
• Blood oxygen saturation

The upper respiratory tract includes all EXCEPT:

• Nasal cavity
• Pharynx
• Bronchioles
• Oral cavity

What is the volume of air that remains in the lungs after a maximum expiration?

• Residual volume
• Tidal volume
• Vital capacity
• Total lung capacity

The conducting zone of the respiratory system:

• Contains alveoli
• Begins at the trachea
• Is where gas exchange occurs
• Produces surfactant

Which structure divides into the right and left main bronchi?

• Pharynx
• Larynx
• Trachea
• Bronchioles

Spirometry measures:

• Blood oxygen levels
• Heart rate during breathing
• Air flow and lung volumes
• Diaphragm movement

The respiratory zone includes:

• Trachea and bronchi
• Alveoli and respiratory bronchioles
• Pharynx and larynx
• Nasal and oral cavities

Peak flow measurements are most useful for monitoring:

• Sleep apnea
• Lung cancer
• Asthma
• Pneumonia