In which of the following types of ventilation is alveolar expansion during inspiration due to an increase in alveolar pressure?
1) Negative-pressure ventilation
2) Positive-pressure ventilation
3) Spontaneous ventilation

Question

Quizplus · Accepted Answer

Alveolar expansion during inspiration due to an increase in alveolar pressure occurs in positive-pressure ventilation, where air is delivered into the lungs via a machine and pressure is increased to push air into the alveoli. In negative-pressure ventilation, such as during spontaneous ventilation or with a mechanical ventilator that uses negative pressure, alveolar expansion occurs due to a decrease in pressure within the thoracic cavity, which causes the lungs to expand and air to flow in.

In Which of the Following Types of Ventilation Is Alveolar