Kinesiology 2230A/B Lecture Notes - Lecture 23: Blood Plasma, Thermoregulation, Vasoconstriction

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

Document Summary

Have to control distribution of blood flow. Vascular system set up in parallel beds. Part of a-vo2 difference is because of blood flow distribution- differences of o2 arriving and leaving tissue. At rest talking about 5l of blood and where it"s being distributed. Once exercise begins, see dramatic redistribution of blood flow. Start with skin, with increased contractile activity, have increased metabolic rate (80% lost as heat) need to maintain body temp. Get increase in blood flow from rest to heavier exercise to the skin. Trying to maintain body temp (don"t want increase in temp) so by redistributing blood to skin thats been warmed at the core, heat will radiate outward and can manage core temperature. Increased blood flow to skin is dramatic- 1 l at rest, heavy exercise 2. 6 l/min. Significant portion of co thats not involved in delivering o2 to the tissue. Moving blood away from working muscle to help maintain body temp.