What is the significance of the negative pressure in human lungs during inspiration?
It helps to push air into the lungs
It creates a pressure gradient for the movement of air into the lungs
It prevents the collapse of the lungs
It has no significant role in the process of breathing
The negative pressure in the human lungs during inspiration creates a pressure gradient between the atmosphere and the lungs, which drives the movement of air into the lungs.
Option 2 is the correct answer.