bv again - 14 Blood pressure volume control again Things to...

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14. Blood pressure/ volume control again Things to use HR- change in chronotropic state SV- starlings law; inotropic state (E B1) TPR- vaso constrict/dilate of arterioles Blood volume- capacitance vessels- kidney- H2O and Na+ control I. Control Systems a. Stretch receptors i. Mainly in artial walls 1. Atrial stretch (+)stretch receptors (+)medulla (via vagal afferents) a. Medulla (+) sympathetic b. Medulla (-) parasympathetic i. Increases heart rate ii. Bainbridge reflex b. Baroreceptors i. Located on aortic arch and carotid sinus 1. Aortic arch- vagal afferents medulla 2. Carotid sinus herring’s nerve Cranial IX afferents medulla ii. MAP (+) baroreceptors (-) medulla (both carotid and aortic arch) 1. (-) parasympathetic (-) contratropic (+) CO 2. (+) sympathetic a. (+) both contratropic and inotropic CO (+) MAP b. (+) venous return (+) CO c. (+) TPR (+) MAP c. Chemoreceptors i. Located on aortic arch and carotid sinus and use same afferents ii. Decrease in O2 and pH and increase in CO2
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bv again - 14 Blood pressure volume control again Things to...

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