Alveolar ventilation

Definition

Alveolar ventilation is the volume of air that reaches the alveoli per minute, where gas exchange with the blood occurs. It is a crucial factor in determining the efficiency of pulmonary function.

5 Must Know Facts For Your Next Test

1. Alveolar ventilation is calculated using the formula: (Tidal Volume - Dead Space) x Respiratory Rate.
2. Dead space refers to areas of the respiratory system where no gas exchange occurs, such as the trachea and bronchi.
3. Effective alveolar ventilation ensures adequate oxygen delivery and carbon dioxide removal from the body.
4. Hyperventilation increases alveolar ventilation, leading to decreased levels of CO2 in the blood (hypocapnia).
5. Hypoventilation decreases alveolar ventilation, resulting in increased levels of CO2 in the blood (hypercapnia).

Review Questions

• How is alveolar ventilation calculated?
• Why is dead space subtracted from tidal volume when calculating alveolar ventilation?
• What are the effects of hyperventilation on alveolar ventilation and blood CO2 levels?

Related terms

Tidal Volume: The amount of air inhaled or exhaled during a normal breath.

Dead Space: Areas within the respiratory system where no gas exchange takes place.

Respiratory Rate: The number of breaths taken per minute.