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by: Renee Lehner


Renee Lehner
GPA 3.73

Tolga Bilgen

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About this Document

Tolga Bilgen
Class Notes
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This 3 page Class Notes was uploaded by Renee Lehner on Wednesday September 9, 2015. The Class Notes belongs to BIOL 118 at University of Washington taught by Tolga Bilgen in Fall. Since its upload, it has received 22 views. For similar materials see /class/192323/biol-118-university-of-washington in Biology at University of Washington.




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Date Created: 09/09/15
Notes For Monday 21411 I Parasympathetic o Vagus nerve talking to nodal tissue musculature I fires acetyl choline o Slows down action potential rate 0 Caused by K efflux o hyperpolarizes I Sympathetic 0 Cardiac nerve I Epinephrine and norepinephrine used as neurotransmitters by this nerve I depolarization of nodal tissue I lncreases heart rate I lncrease action potential conductance AV node Pu rkinje fibers have to increase APs I lncreases stroke volume 0 Baroreceptors I Decrease in Blood Pressure these receptors would know I Start firing action potentials and talk to cardiac center in the brain 0 The Medula o Cardio acceleratory center 0 lncreases heart rate when Blood pressure is low 0 Activates cardiac nerve o Chemoreceptors I Notice 02 decrease in blood 9 increase in heart rate 9 cardiac nerve Notice an increase in C02 increases heart rate 9 cardiac nerve 0 Cardiac inhibitory center I Vasculature Vagus nerve Can be activated by chemoreceptors noticing too much 02 or not enough C02 Or baroreceptors notice too high blood pressure 0 Blood should stay inside pipes arteries veins capillaries etc 0 Right Atrium Sends blood to right ventricle Sends blood to artery Sends blood to arteriole small artery Sends to capillaries 0 Pulmonary circulation 0 Blood exchanges C02 for 02 goes to venules small veins Sends to veinsvein Goes to left atrium Next left ventricle Sends blood through Aorta chemoreceptors baroreceptors there Sends to arteries sends to arterioles sends to capillaries Next goes through venules then to veins I Sends to Vena Cava I Then to right atrium o Veins always going back to the heart 0 Arteries always going away from the heart 0 Pulmonary has oxygenated blood in veins deoxygenated in arteries I Pressure 0 Form of potential energy I millimeters of mercury used to measure pressure mmHg I Higher Pressure 9 Lower pressure I Pressure greater in arteries than in veins I Pressure greater in ventricle than in arteries I pressure gradient 0 Forms of resistance I Vascular resistance 0 Friction with walls of blood vessel 0 Decreases with big diameter 0 lncreases with small diameter 0 Vascular resistance is the biggest player in slowing down blood 0 Smooth musculature can decreaseincrease diameter of blood vessels I Viscosity 0 Friction of fluid to its own self Blood 5x thicker than water


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