KINE 2011 Lecture Notes - Renal Function, Renal Medulla, Renal Cortex

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Map= the extent to which it changes reflects how much co increased and tpr decreased. Resistance excercisese causes higher drop in map, since its affected by the cardiac output. Exercise is causing increase in map, there is a reduction in baroreceptor activity, less of a signal is being sent to the cardiovascular center (for increasing pns). We also have a tremendous drive coming from motor cortex that is increasing the sns activity. The input from sns is able to over-ride any baroreceptor signals coming through. That is why you are able to increase map, and maintain a high sympathetic nerve activity during this because of this. Baroreceptors you rely on them to change second-second changes in map. The problem with baroreceptors that they are only good to react for a short period of time, if they are provided with the same stimulus over an extended period of time.

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