The volume of gas that reaches the respiratory zone (gas-exchange zone) of the lung is termed
A) anatomical dead space.
B) minute ventilation.
C) alveolar ventilation.
D) tidal volume.

Question

The volume of gas that reaches the respiratory zone (gas-exchange zone) of the lung is termed 
A) anatomical dead space.
B) minute ventilation.
C) alveolar ventilation.
D) tidal volume.

Quizplus · Accepted Answer

The volume of gas that reaches the respiratory zone (where gas exchange occurs) of the lung is called alveolar ventilation. Anatomical dead space refers to the volume of the conducting airways (nose, trachea, bronchi) that do not contribute to gas exchange. Minute ventilation refers to the total volume of air that is moved in and out of the lungs in one minute. Tidal volume is the amount of air that is typically inspired and expired during normal breathing.

The Volume of Gas That Reaches the Respiratory Zone (Gas-Exchange