Exploring the Respiratory System

Which structure is responsible for filtering, warming, and moistening the air as it enters the respiratory system?

• Larynx

• Nasal cavity

• Bronchioles

• Diaphragm

What is the main function of the epiglottis in the respiratory system?

• To produce sound

• To prevent food from entering the trachea

• To exchange gases

• To contract during inhalation

Which part of the respiratory system connects the nasal cavity to the larynx?

• Pharynx

• Bronchus

• Alveoli

• Diaphragm

What is the primary function of the larynx?

• Gas exchange

• Voice production

• Filtering air

• Regulating blood pH

Which structure serves as the main airway leading to the lungs?

• Bronchioles

• Trachea

• Alveoli

• Diaphragm

The trachea divides into two branches called:

• Bronchi

• Alveoli

• Pharynx

• Larynx

Which structure is the site of gas exchange in the lungs?

• Bronchioles

• Alveoli

• Trachea

• Pharynx

What is the function of the diaphragm in respiration?

• To produce mucus

• To contract and relax, changing the volume of the thoracic cavity

• To filter air

• To exchange gases

Which muscles are located between the ribs and assist in breathing?

• Diaphragm muscles

• Intercostal muscles

• Abdominal muscles

• Pectoral muscles

What is the role of the external intercostal muscles during inhalation?

• They relax to decrease thoracic volume

• They contract to lift the ribcage and increase thoracic volume

• They contract to lower the ribcage

• They produce mucus