Return to circulation 36 Lday flows i nto lymphatic vessels Venule KEY Reabsorption 204 Lday No net fluid movement Filtration 24 Lday NFP 10 mm Hg NFP 0 NFP 7 mm Hg 35 m m Hg 2 5 ID: 767203
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Return to circulation 3.6 L/day flowsinto lymphaticvessels Venule KEY Reabsorption 20.4 L/day No net fluidmovement Filtration 24 L/day NFP = +10 mm Hg NFP = 0 NFP = 7 mm Hg 35mmHg 25mmHg 25mmHg 25mmHg 25mmHg 18mmHg Arteriole CHP (Capillaryhydrostatic pressure) BOP (Bloodosmotic pressure) NFP (Net filtration pressure)
2 Filtration at the Arterial end Net filtration pressure: CHP-BCOP=35-25=10 Reabsorption at the Venous end Net filtration pressure:CHP-BCOP=15-25=-10
Figure 21-13 Baroreceptor Reflexes of the Carotid and Aortic Sinuses (Part 1 of 2). Responses to Increased Baroreceptor Stimulation BaroreceptorsCardio-inhibitory center Cardio-acceleratorycenter Vasomotor centercardiac output Vaso…occurs HOMEOSTASISRESTORED Blood pressuredecreasesIncreasing blood pressureHOMEOSTASISDISTURBED StartHOMEOSTASIS Normal rangeof bloodpressure
Figure 21-13 Baroreceptor Reflexes of the Carotid and Aortic Sinuses (Part 2 of 2).Start Decreasing blood pressure HOMEOSTASISDISTURBED Baroreceptors Vaso….occurs Cardiacoutput Vasomotor center Cardio-acceleratory Cardio-inhibitorycenter Responses to DecreasedBaroreceptor StimulationHOMEOSTASIS Normal rangeof bloodpressure Blood pressure HOMEOSTASIS RESTORED
Stimulus: Rising blood pressure Homeostasis: Blood pressure in normal range Baroreceptorsin carotid sinuses andaortic archstimulated Arterialblood pressure rises abovenormal range Impulse traveling alongafferent nerves frombaroreceptors:cardio-inhibitory center cardio-acceleratory center vasomotor center 5
Vasomotor Fibers vasomotor center Impulses frombaroreceptors:cardio-acceleratory centercardio-inhibitory center Stimulus:Decliningblood pressure Arterial blood pressurefalls below normal rangeBaroreceptors incarotid sinuses and aortic archHomeostasis: Blood pressure in normal range 6