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