PHYSIOL 201 Chapter 11: PHYSIOL 201 Chapter : Regulation of BP
26 Feb 2019
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Readings: chapter 12 pages 411-416: blood pressure is also referred to as mean arterial pressure (map) Location of arterial baroreceptors: map pressure is the regulated variable in the. Therefore, there must be a pressure sensor to detect any changes in. The afferent axon projects to the medulla oblongata where the cardiovascular control center is located. The control center then alters output via sympathetics to the sa node, ventricle, and blood vessels and via parasympathetics to the sa node. The altered outputs will change hr (via sa node changes), Sv (via ventricular contraction changes), and tpr (via arteriolar constriction/dilation) to maintain map relatively constant: map = hr x sv x tpr. Map changes and baroreceptor firing rate: this graph shows that baroreceptor firing has a normal set point. Map of around 93 mmhg (rounded to 100 mmhg a lot), the baroreceptor ap frequency is set at a certain value (black dot and arrow).
