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Pulmonary Circulation Test With 100% Correct Answers
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Pulmonary Circulation Test With 100% Correct Answers
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Pulmonary Circulation Test With 100%Correct Answers
Pulmonary system?
Right ventricle... CORRECT ANSWERS Right ventricle --> pulmonary artery --> Lung
Pulmonary vein... CORRECT ANSWERS Pulmonary vein --> Left atrium & ventricle -->
Systemic Circulation
How much of CO does pulmonary blood flow determine? CORRECT ANSWERS
pulmonary blood flow = 100% Cardiac Output
Pulmonary artery pressure? CORRECT ANSWERS 15 mmHg
Aortic pressure? CORRECT ANSWERS 100 mmHg
Higher pressure system: Left or Right heart? CORRECT ANSWERS Left Heart, of
course!
What is resistance determined by? CORRECT ANSWERS Change in pressure/ change
in blood flow
To determine resistance, the pressure gradient is needed. What determines the
pressure gradient in the formula? CORRECT ANSWERS (Input pressure - Output
pressure)/Blood Flow
Input = 15 mmHg (MAP) (from body towards lung)
Output = 5 mmHg (left atrium pressure) (from lungs towards body)
Blood Flow is a constant value. What is it? CORRECT ANSWERS 6 L/min (which is the
CO)
Pulmonary Resistance is equal to? CORRECT ANSWERS (15-5)/6 = 1.7 mmHg/L/min
Pulmonary artery vs. aorta?
a) walls
b) smooth muscle in walls CORRECT ANSWERS pulmonary artery: thin walled,
minimal smooth muscle. 7x more compliant than systemic vessels, easily distensible...
meaning: require lower pressure for blood flow through the pulmonary circulation than
the more muscular sytemtic arteries...
High compliance, low resistance; aids in the flow of blood via the weak pumping action
of the right ventricle.
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