Created by J yadonknow
over 6 years ago
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Question | Answer |
What is BP? | Diff. btw. P in system + transmural P |
2 Components of BP | Dynamic P generated by HSP of blood in column |
What is the R of the whole system equal to? | Total R of each individual Resistor |
What is the R of a system in parallel? | Sum of the inverse of each resistor's R |
G | G=1/R |
How resistors in parallel used in CV | Capillaries, adding more resistors decreases total resistance of the system Increases conductance 1/R |
Arterioles | Small lumen, high resistance ^ time for nutrient absorption |
Blood resevoir | Veins Blood pools here |
Why massaging effect important? | If no massaging effect then less blood in heart at end of diastole CO reduced |
Diagram P changes in heart | Slow curve down. P decreases as R increases. |
Arterial pulse pressure wave | Pulse pressure Diastolic pressure Dicrotic notch Mean pressure |
Dicrotic notch | Due to aortic valve closure. |
MAP | DP+(1/3(SP-DP)) Mean arterial pressure |
What is DP? | Diastolic pressure T until laminar flow is restored after compression. |
Effects of gravity on Fluid E (4) | Pt. E from Heart beat KE from fluid itself Pt. E due to position in gravitational field Fluid from total E high -> Total E low |
HSP | Dynamic P produced by pump |
Where is P higher? | At base of column as pressure increases in proportion to height of fluid in column. |
Where is R greatest? | In arterioles |
P above heart | Arterial pressure decreases w height |
P below heart | Fluid-column effects ^ arterial P |
Arteries are a reservoir of what? | Pressure Maintains systemic pressure during DIASTOLIC phase Dampen oscillations in pressure and flow |
Pressure in diastole | High P on pAO sustained |
How are they suited to this? | Elastic and recoil to drive blood into arterioles |
BP in system | Tri+ bi open : Blood flow into ventricle, exapnds Mitral valve closes: Pressure ^ Ventricle relaxes - valves open again |
Pressure in systole | pAO = pV |
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