Final answer:
Pendelluft produces negative pressure ventilation, which is when the pressure in the lungs is lower than the atmospheric pressure. So, the correct answer is option b.
Step-by-step explanation:
Pendelluft produces negative pressure ventilation.
Negative pressure ventilation is when the pressure in the lungs is lower than the atmospheric pressure. This causes air to be drawn into the lungs, filling the alveoli with oxygen. Pendelluft is a phenomenon in which there is a difference in the pressure and airflow within different regions of the lungs.
So, the correct answer is option b.