This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Functional Anatomy - Respiratory System, Subject name: Physiology
Transpulmonary pressure is difference between? 
Select and explain. 
A. The bronchus and atmospheric pressure, B. Pressure in alveoli and intrapleural pressure, C. Atmosphere and intrapleural pressure, D. Atmosphere and intraalveolar pressure
B: Pressure in alveoli and intrapleural pressure
Answer: B: Pressure in alveoli and intrapleural pressure 
Explanation: ANSWER: (B) pressure in alveoli and intrapleural pressureREF: Ganong 22nd ed p. 648Transpulmonary pressure is a term used to describe the difference between the alveolar pressure and the intrapleural pressure in the lungs. During human ventilation, air flows because of pressure gradient