PHYSIOL 201 Lecture Notes - Lecture 20: Autotransfusion, Medulla Oblongata, Baroreceptor
3 May 2019
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Hemorrhage: map = hr x sv x tpr, heart rate increased compared to normal. 12-24 hours for hemorrhage < 1. 5 l (as long as blood loss is stopped): total fluid volume only returns to normal if you replace lost fluid: Increased liver production and secretion of plasma proteins, begins within hours, restores proteins in days-weeks. Increased bone marrow production of blood cells, begins within hours: restores hematocrit within days-weeks, kidneys absorb the fluid you take in and bring the system back to normal. Diversion of blood flow to maintain perfusion of heart and. In gi/skin/muscle, when resistance goes up, flow drops even more: tpr is still really high at like 20% blood loss, constriction of arterioles to organs is really high, big reduction in flow to other areas above. Control of cv system during exercise: when you get ready to exercise, baroreceptors receive signals to reset set point.
