Term
What are the lung primary and secondary functions? |
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Definition
Gas exchange
Metabolic, Filter, Blood Reservoir |
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Term
Four stages of respiration |
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Definition
I: Ventilation
II: Pulmonary gas exchange
III: Gas transport
IV: Peripheral gas exchange |
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Term
Which parts make up the conductive system (dead space)?
How much volume is dead space? |
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Definition
Trachea -> main bronchi -> lobar bronchi -> segmental bronchi -> terminal bronchi
first 16 generations
150 ml |
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Term
What makes up the gas exchange system?
What is another name for these respiratory zones?
What volume can it hold? |
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Definition
respiratory bronchioles -> alveolar ducts -> alveoli
last 7 generations
aka acinus
2.5-3 L |
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Term
Bronchus has _____ cartilage.
Bronchiole has _____ cartilage. |
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Definition
Bronchus has incomplete cartilage.
Bronchiole has no cartilage. |
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Term
The combined cross section of daughter branches is generally _____ than the mother bronchus. |
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Definition
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Term
What is the narrowest part of the airway? |
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Definition
4th generation (bronchioles) |
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Term
During inspiration, air travels to the terminal bronchus by _____.
Beyond that, how does it travel? |
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Definition
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Term
Compliance and elasticity |
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Definition
Compliance is dV/dP.
Elasticity is inverse of compliance. |
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Term
Normal breath of 500mL requires distending pressure of _____. |
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Definition
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Term
How thick is the blood-gas interface?
What is its surface area? |
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Definition
extremely thin
50-100 square meters |
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Term
Epithelium lines _____.
Endothelium lines _____. |
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Definition
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Term
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Definition
Large, flattened cells
gas exchange
account for 90% of the surface area |
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Term
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Definition
Large, cuboidal cells
synthetic, secretory functions
twice as many in number as Type I cells |
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Term
Concepts of Fick's Law of Diffusion |
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Definition
Volume of gas crossing membrane is
-directly proportional to the area, diffusion constant, pressure difference
-indirectly proportional to the thickness |
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Term
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Definition
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Term
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Definition
PAO2 = 713 * FiO2 - PaCO2 / 0.8 |
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Term
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Definition
Supplies conducting airways to terminal broncioles.
High pressure, low flow. |
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