PHSI2005 Study Guide - Final Guide: Baroreflex, Vasomotor Center, Baroreceptor
15 Jan 2019
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Regulation of blood pressure: how mean arterial pressure is controlled, the baroreceptor reflex, sympathetic influences on the heart and circulation, hormonal influences on the heart and circulation. At the end of the lecture you should be able to: briefly describe the afferent and efferent pathways subserving the baroreceptor reflex, describe the morphology of baroreceptors. Why is regulation of arterial blood pressure important in homeostasis? (cid:120) arterial bp is essentially the same as the perfusion pressure for all organs (difference between arterial pressure and venous pressure). Perfusion pressure is required for blood flow through organs at a sufficient rate. Homeostasis requires delivery of sufficient metabolic requirements of each region. Increase in bp (cid:198) increase in firing of baroreceptors. 81: draw a block diagram summarising the effects on autonomic nerve activity and the subsequent effects on cardiovascular variables reflexly evoked by a change in baroreceptor firing rate.
