This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Physiology
True about inspiration;the intrapleural pressure becomes- 
Select and explain. 
A. More –ve, B. More +ve, C. Same, D. Initially positive, then negative
A: More –ve
Answer: A: More –ve 
Explanation: The intrapleural pressure becomes more negative at the end of inspiration and less negative at expiration. It ranges between -3 and -6 mmHg.