Unit 9 Practice Questions

Front

What is the laryngopharynx?

Back

The laryngopharynx is the lower part of the pharynx where both the oropharynx and nasopharynx merge, leading to the larynx.

Front

What happens to the pleural cavity volume when the diaphragm relaxes?

Back

When the diaphragm relaxes, the volume of the pleural cavity decreases, causing air to rush out of the lungs.

Front

What is tidal volume?

Back

Tidal volume is the amount of air that moves in and out of the lungs during normal breathing.

Front

How many lobes does the right lung have?

Back

The right lung has three lobes.

Front

What occurs when the diaphragm contracts?

Back

When the diaphragm contracts, it lowers and increases the volume of the pleural cavity, causing air to move into the lungs.

Front

Define the term 'pleural cavity'.

Back

The pleural cavity is the space between the pleurae (the membranes surrounding the lungs) that contains pleural fluid.

Front

What is the function of the diaphragm in respiration?

Back

The diaphragm contracts and relaxes to change the volume of the thoracic cavity, facilitating inhalation and exhalation.

Front

What is the difference between inspiratory reserve volume and tidal volume?

Back

Inspiratory reserve volume is the amount of air that can be inhaled after a normal inhalation, while tidal volume is the amount of air inhaled or exhaled during normal breathing.

Front

What is the role of the larynx in the respiratory system?

Back

The larynx is responsible for sound production and protecting the trachea against food aspiration.

Front

What is the mediastinum?

Back

The mediastinum is the central compartment of the thoracic cavity, containing the heart, great vessels, trachea, and esophagus.