Exam 3: Lecture 41: Mechanise Of Breathing Flashcards
What is the most important muscle for inspiration
Diaphragm
Is expiration passive or active
Passive
What is compliance of the lungs defined as?
Distendibility of the respiratory system
What is compliance of the lungs defined as?
Distendibility of the respiratory system
What is defined as lung changes in response to the lung volume for a given change in pressure
Compliance
The compliance of the lungs and chest wall is inversely correlated with what properties
Elastic / elastance properties
Define transmural pressure
Pressure across the structure
What sets the pressure volume loop that shows the slope of each limb of the pressure volume loop and the compliance of the isolated lung
Sequence of inflation and deflation
What is the effect at which the highest exapnding pressures, when the alveoli are filled to the limit?
They become stiffer and less compliant
- they curve starts to flatten
What is a pneumothorax
When the negative pressure inside the lung becomes positive and the lung collapse
What is defined as the intrapleural pressure suddenly becomes equal to atmospheric pressure
Pneumothorax
When there is a disease or issues related to the lung, does compliance increase or decrease?
Decreases
What is surfactant
A mixture of phospholipids that line the alveoli and reduce their surface tension
What is the driving force that says without a pressure difference, air flow will not occur
Pressure difference
What size bronchi are the sites of highest airway resistance ?
Medium sized bronchi
