Week 2 Airflow Lab Flashcards
What is the primary muscle involved in breathing
Diaphragm
What nerve innervates the Diaphragm
Phrenic nerve
What causes resistance in the lungs?
Friction between the gas and the tube wall.
interactions of gas particles depend on:
1. Dimension of the airway (density and radius).
2. Density of the gas.
3. The flow profile (whether the flow through the airway is laminar or turbulent).
Whats a laminar flow?
The rate at which the airflow is proportionate to the pressure gradient driving that flow. Q = change in P/R Q: flow rate change in P: Pressure gradient R: Resistance
How does bronchioles help in breathing?
Reduces resistance by providing a larger total cross-sectional area
Whats the spirometer and the spirogram
Spirometer is a device that records the changes in lung volume directly.
Spirogram is the resulting graph of lung volume overtime
What’s tidal breathing?
our breathing cycle at rest, where the lung constantly inhales and exhales the same amount of air
Whats the Inspiratory Reserve Volume (IRV)?
The maximum amount that we can inspire into our lungs
What’s the Tidal Volume? And whats the adult average Tidal Volume.
The volume we inspire and expire at rest. In adults it is normally around 0.5L
What is the Expiratory Reserve Volume (ERV)?
It is the max volume we could expire from out lungs
What is the Residual Volume (RV)?
It is the volume of air that remains in the lungs after full expiration
What is the Inspiratory Capacity (IC)?
All the air that’s breathed in during maximum inhale at the end of a normal exhale.
IRV + VT
What is the Expiratory Capacity (EC)?
The maximum the air breathed out after a normal inhale
VT + ERV
What is a Functional Residual Capacity (FRC)?
The volume of air remaining in the lungs after a normal exhale.
ERV + RV
What is the vital capacity?
The capacity of the lung during a maxed out inhale and a maxed out exhale.
IRV + VT + ERV
