Section 2 Lecture 2 Flashcards
how is pressure related to both volume and stiffness?
proportionally P = V X Stiffness
How is pressure related to volume?
proportional relationship P = V/Compliance
How is pressure related to compliance?
inverse relationship
stiffness =
1/compliance = delta P (trans)/ delta V(s)
Q =
delta P/ R
mean circulatory pressure:
10 mmHG
How much more compliant is the venous system than the arterial system?
19X more compliant
T or F? most of the stressed volume resides on the arterial side of the system.
F. Venous side
T or F? For a pressure increase in the arteriole system there must be a compensatory decrease of the same pressure on the venous side.
F. Pressure increases much more per a given volume because there is much less compliance in the arterial system than the venous system
Relationship (equation) bw pressure, volume and compliance:
P = V/ Compliance
If the pressure increases on the arterial side 90 mm Hg (from 10 - 100), what will the corresponding decrease in venous pressure be?
- mm Hg
Change in arterial pressure with each pump of the heart
about 5 mm Hg
Change in venous pressure with each pump of the heart
about 2.5 mm Hg
Standing pressure of the right atrium:
2 mmHG
Standing pressure of the pulmonary artery:
20 mmHG
Standing pressure of the left atrium:
5 mm Hg
Standing pressure of the aorta:
95 mm Hg
Pressure gradient bw the pulmonary artery and the left atrium:
15 mm Hg
Total change in pressure of the system:
93 mm Hg
Where is there a higher pressure, the right atrium or the right ventricle?
right atrium
How much pressure does the R side of the heart exert to pump blood through the lungs?
about 30 mm Hg
How much pressure does the L side of the heart exert to pump blood through systemic circulation?
about 110 mm Hg
