BIO124 Chapter 23

Front

What happens to air pressure inside the lungs when air moves out?

Back

Air moves out of the lungs when the pressure inside the lungs is greater than the pressure in the atmosphere.

Front

When does oxyhemoglobin form during respiration?

Back

Oxyhemoglobin forms during external respiration.

Front

What separates the nasal cavity from the oral cavity?

Back

The nasal cavity is separated from the oral cavity by the hard palate.

Front

What is the function of the Hering-Breuer reflex?

Back

The Hering-Breuer reflex protects the lungs from damage due to overinflation.

Front

What is the relationship between quiet breathing and shallow breathing?

Back

Quiet breathing is to eupnea as shallow breathing is to costal breathing.

Front

Define eupnea.

Back

Eupnea is the term for normal, unlabored breathing.

Front

What is the role of the diaphragm in breathing?

Back

The diaphragm contracts and flattens to increase the volume of the thoracic cavity during inhalation.

Front

What is the significance of the hard palate in the respiratory system?

Back

The hard palate separates the nasal cavity from the oral cavity, allowing for simultaneous breathing and eating.

Front

Explain the process of external respiration.

Back

External respiration is the exchange of gases between the alveoli and the blood in the pulmonary capillaries.

Front

What triggers the Hering-Breuer reflex?

Back

The Hering-Breuer reflex is triggered by the stretching of the lungs during deep inhalation.