Respiratory System

Front

What is pulmonary surfactant?

Back

A substance that reduces surface tension in the alveoli, preventing their collapse during exhalation.

Front

What happens if there is a lack of pulmonary surfactant?

Back

Increased risk of alveoli collapse at expiration.

Front

What is the glottis?

Back

The opening between the vocal cords.

Front

What are the main brain structures involved in controlling respiration?

Back

Medulla and pons.

Front

What is the pharynx?

Back

A chamber behind the nose and mouth that leads to the trachea.

Front

What is external respiration?

Back

The process of exchanging oxygen and carbon dioxide in the lungs.

Front

What is the role of the larynx?

Back

To protect the trachea against food aspiration and to produce sound.

Front

What is the function of the diaphragm in respiration?

Back

It contracts to create a vacuum that pulls air into the lungs.

Front

What is the difference between inspiration and expiration?

Back

Inspiration is the process of taking air into the lungs, while expiration is the process of expelling air from the lungs.

Front

What is the trachea?

Back

The windpipe that connects the pharynx and larynx to the lungs.