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26 Cards in this Set
- Front
- Back
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________ % of resistance to flow is on the arterial side at the arterioles.
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80
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Venous side of circulation has ______ % of blood volume.
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70
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The veins and the _______ have one-way valves to ensure unidirectional flow of blood.
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Heart
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The arteries and veins are in a state of _________ __________ d/t the continuous release of norepi, from the sympathetic nerve terminals located in the walls of these vessels.
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Partial constriction
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The heart ejects blood only during about _____ of the cardiac cycle.
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1/3
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The potential energy stored in the ________ ________ maintains the pressure that keeps blood flowing during the rest of the cardiac cycle. This is due to elastic recoil.
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Elastic arteries
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The aorta is like a balloon, the larger you inflate it, the more ______ ________ there is.
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Recoil pressure
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The ________ of blood in the arteries determines arterial pressure.
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Volume
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The distensibility of the arterial wall generally decreases with _____ _______.
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Increasing age
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The pressure volume relationship grafts show on the slope the ∆ ?/ ∆ ? which is defined as?
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∆ volume / ∆ pressure; Ca (arterial capacitance)
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Capacitance is also called?
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Compliance or distensibility
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What is the capacitance equation?
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Ca = ∆ V/ ∆ P (vol/press)
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What is the equation of the mean arterial pressure?
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Pd + 1/3(Ps - Pd)
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Pulse pressure is equal to ________/ ________.
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SV; Ca
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Name the two determinants of the vol of blood in the large arteries ( and hence the pressure in the large arteries).
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CO and vascular runoff
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The rate at which blood enters the large arteries fro the LV of the heart is termed the ?
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C.O.
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The rate at which blood flows thru all of the organs of the body, or bld flow thru the TPR), is called the?
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Vascular runoff
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The rate of change of blood volume in the large arteries is just the rate at which blood flows _______ the arteries _______ the rate at which blood flows ______ of the arteries.
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Into; minus; out
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As Pa increases during systole, blood must be entering the arteries ______ than is it flowing through the organs; during diastole, the opposite is true.
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Faster
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Diastolic pressure corresponds with the volume of blood in the ______ ________.
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Large arteries
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At a constant C.O., increasing TPR will result in an elevated _________.
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Pa (press average)
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TPR influences _________ indirectly.
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Pulse pressure
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One would expect a HTN person to have a __________ pulse press for a given SV then would a person with normal arterial pressure.
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Higher
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What is a term that defines flood flow thru all the organs?
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C.O.
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Medications, hormones, and plaque can all increase TPR by _________ arterioles.
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Constricting
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As Ca decreases, ______ ________ increases.
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Pulse pressure
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