Regulating Peripheral Resistance - Part 1

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Mean Arterial Pressure is Cardiac Output times Peripheral Resistance. That means if there's a change in Peripheral Resistance, that will result in a change in Mean Arterial Pressure. In this video, Leslie gets into the topic of regulating Peripheral Resistance by using the examples of Epinephrine and Norepinephrine. He also goes into how Plaque in the arteries influences Pressure by influencing Peripheral Resistance.

➟ Video Chapters

00:00 Intro
00:33 Review - Blood Pathway to and from the heart
01:20 Review - Two ways of Calculating Mean Arterial Pressure
02:30 What is Peripheral Resistance?
03:49 Regulating Peripheral Resistance
04:05 Blood vessels involved in the blood pathway
05:16 Effect of Dilation and Constriction of Arterioles on Peripheral Resistance
07:16 Epinephrine and Norepinephrine Effects on Peripheral Resistance
08:05 Epinephrine as Vasodilator ⇨ Decrease Peripheral Resistance
10:24 Norepinephrine as Vasoconstrictor ⇨ Increase Peripheral Resistance
12:00 Changing Peripheral Resistance Affects Mean Arterial Pressure values
12:38 Summary
13:08 Additional sample: Atherosclerosis ⇨ Increase Peripheral Resistance and in effect increases MAP and BP.

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