Gas Transport 1 Flashcards
Do respiratory and cardiovascular systems work together?
Yes, they must work together to transfer O2 and CO2 between air and tissues
What is the function of the lungs in terms of respiration
To exchange O2 and CO2 between the atmosphere and body
What is the function of the circulatory system in terms of respiration
To transport O2 and CO2 to and from tissues
What are the differences between the right and left ventricles in terms of ability
What are the differences structurally between the right and left ventricle
What are 9 characteristics of pulmonary circulation
What different structures do the pulmonary and systemic systems of the circulatory system work on
What is the differences between pulmonary and systemic cirulation in terms of Distance travelled, height pumped, # of places distributed to, if its an acceptor or controller, and its role with respect to O2
Acceptor = accepts blood from and passes back to heart
Controller = More control on where blood is sent to (eg. Exercise send more blood to limbs)
What are 3 types of pressures in circulationm
1) Absolute intravascular pressure
2) Driving Pressure
3) Transmural Pressure
Absolute Intravascular pressure
Actual blood pressure in the lumen of a blood vessel
Driving Pressure
Difference in absolute pressures at one point in a vessel and another point downstream
Transmural Pressure
Difference between pressure in the lumen of the vessel (intravascular) and that of tissue around it (extravascular)
Describe the blood pressure in the absolute intravascular pressure
List 3 characteristics of driving pressure
List 3 characteristics of transmural pressure
Are pressures higher in the systemic or pulmonary circuit
Much higher in in the systemic
Is there more resistance in the systemic or pulmonary circuit
Much more resistance in the systemic
How to calculate vascular resistance between pulmonary and systemic circuits and why there is a difference
Label the image
How does pulmonary gas exchange in the lungs work
How does the pulmonary circulation function as a blood reservoir (3)
Differences in lung compliance, elasticity, and SOB with cardiovascular disease in supine vs sitting positions
How does the pulmonary circulation provide protection and nutrition
Explain this image
Dilution of deoxygenated blood mixing with oxygenated blood (bronchial vein empties into pulmonary vein)
- the pulmonary artery brings deoxygenated blood to the alveoli in lungs to become oxygenated (gas exchange) where it is sent back through pulmonary veins to the left ventricle to be pumped through the aorta systemically
-the aorta then sends oxygenated blood via bronchial artery to the non-alveolar lung tissue to provide oxygen to lung tissue for function which then the bronchial veins filter back the deoxygenated blood some through the pulmonary veins (goes back to left ventricle) and the rest through the azygous vein where it returns to the right atrium/ventricle to restart the system
Pulmonary blood flow distribution depends on (3)
1) Relationship of arterial, capillary and venous intravascular pressures
2) Transmural pressure
3) Driving pressure
Describe the absolute intravascular arterial pressure
Describe perfusion in the lungs
Perfusion decreases as you move up the lung and increases as you move down the lungs
Describe the transmural pressure in the lungs
Name 3 differences between the alveolar (smaller) and extra-alveolar (larger) vessels
Describe the difference in alveolar vessels when the lung is relaxed vs expanding
Is intravascular pressure impacted by gravity
Yes
