Kinesiology 2230A/B Lecture Notes - Lecture 5: Capillary, Autoregulation, Vasodilation

• School: Western University
• Department: Kinesiology
• Course: Kinesiology 2230A/B
• Professor: Glen Belfry

Document Summary

At least part of a-vo2diff due to better blood flow distribution: redistribution will increase a-vo2 diff. Blood distribution is set up as parallel vascular beds. Need to be able to distribute blood flow to the areas where o2 is required. At rest, 5l of blood and where it is distributed. Exercise: dramatic redistribution of blood flow o o. Increase in blood flow to skin, trying to maintain homeostatic body temperature, blood has been warmed in the core and will radiate outward. Heart blood flow must increase proportionally with the work rate. Vasodilation- increased temperatures, allows warm blood to move closer to periphery, radiated away. Myocardial blood flow is proportional to work rate, blood flow to the heart doesn"t change in a relative perspective. Arterioles control flow to these beds o. Interface between main arteries and capillaries: where vasoconstriction and vasodilation occur.