PHYSIOLOGY
PULMONARY PHYSIOLOGY
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
What pressure gradient is exhalation triggered by?
|
|
The pressure in the lungs is less than the pressure of the atmosphere
|
|
|
The pressure in the lungs is greater than the pressure of the atmosphere
|
|
|
The pressure in the lungs is equal to the pressure of the atmosphere
|
|
|
None of the above
|
Explanation:
Detailed explanation-1: -Transpulmonary pressure is the pressure gradient between the inside alveolar pressure and outside pleural pressure. It mainly measures the force of lung elasticity at each point of respiration (recoil pressure).
Detailed explanation-2: -The important parts involved in creating a pressure gradient between lungs and the atmosphere during normal respiration are Diaphragm and Intercostal muscles.
Detailed explanation-3: -As alveolar pressure begins to exceed that at the mouth, the positive transrespiratory pressure gradient causes air to move out of the lungs. Expiratory flow drops to zero, and a new respiratory cycle begins. There are some forces that must be overcome in order for ventilation to occur.
There is 1 question to complete.