Pulmonary Ventilation All Answers Verified
Name the 5 layers of the atmosphere ️️troposphere, stratosphere, mesosphere, thermosphere,
exosphere
% of atmospheric gases ️️Nitrogen - 78%
Oxygen- 21%
Trace gases - >1%
What holds the layers of the atmosphere in place? ️️Gravi...
Name the 5 layers of the atmosphere ✔️✔️troposphere, stratosphere, mesosphere, thermosphere,
exosphere
% of atmospheric gases ✔️✔️Nitrogen - 78%
Oxygen- 21%
Trace gases - >1%
What holds the layers of the atmosphere in place? ✔️✔️Gravity
The higher up the air the _______ the pressure. ✔️✔️lower
The boiling point ______ as the altitude increases. ✔️✔️decreases
What is the barometric pressure at sea level? ✔️✔️760 mmHg
Pulmonary ventilation pressures are commonly expressed as... ✔️✔️mmHg (Torr) or cm H2O
A pressure difference is also called ✔️✔️pressure gradient
In order for gas to move it has to first have a ✔️✔️pressure difference
Gas or fluid flows from ________ pressure to ________ pressure. ✔️✔️A high; a lower
During inspiration, what happens to the diaphragm? ✔️✔️pushes downward to increase the lung
volume, pressure decreases
, During expiration, what happens to the diaphragm? ✔️✔️The diaphragms relaxes and the space in the
lung gets smaller, the pressure increases.
Pressure inside the lungs "equals" the pressure in the atmosphere ✔️✔️Equilibrium point
Equilibrium point occurs at what two points during the respiration cycle ✔️✔️end-inspiration & end-
expiration
Under normal conditions the intrapleural pressure is always below the _____________ pressure.
✔️✔️barometric
The lungs naturally _________. ✔️✔️recoil inward
The chest wall naturally ________ ✔️✔️expand outward
The lungs naturally recoil inward & the chest wall naturally expands outward, this generates
✔️✔️Subatmospheric pressure (negative pleural pressure) between the parietal and visceral pleurae
Normal breathing:
Excursion of the diaphragm _________
Pleural pressure change _______ ✔️✔️1.5 cm ; 3-6 cm H2O (2-4 mmHg)
Deep inspiration
Excursion of the diaphragm __________
Pleural pressure change __________ ✔️✔️6-10 cm ; -50 cm H2O
Forced expiration
pleural pressure change _____________ ✔️✔️+70 and 100 cm H2O
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