Exam 36: Ventilation

The apneustic center is located in what part of the nervous system?

Which gas law deals with the solubility of gases in solution?

The volume of inspired air that actually reaches the alveoli is called alveolar ventilation.

When the pressure in the lung is greater than atmospheric pressure:

A relatively large increase in arterial oxygen partial pressure stimulates an increase in breathing rate.

The residual volume is increased with a pneumothorax.

When the diaphragm relaxes, it increases the size of the chest cavity, causing air to move into the lung.

The inspiratory capacity is equal to the sum of the tidal volume and the inspiratory reserve volume.

Explain the diving reflex.

The amount of air that could be forcibly expired after normal expiration is called the functional residual capacity.

Vital capacity is the sum of inspiratory reserve volume, tidal volume, and expiratory reserve volume.

Alveolar ventilation is inspired air minus:

The pneumotaxic center normally inhibits the apneustic center and the inspiratory center to permit a normal rhythm of breathing.

The gas laws are based on the concept of a standard gas whose molecules are so far apart that they rarely collide.

The expiratory center of the medulla seems to be inactive in normal, quiet breathing.

Physiological dead air space can never be less than anatomical dead air space.

Anatomical dead space approximates 10% of the tidal volume.

The term used to describe the volume of air exchanged during normal inspiration and expiration is:

Charles law deals with the relationship between pressure and volume.

Dyspnea is often associated with hyperventilation.