PSL301H1 Lecture 13: L13 Exercise, Capillary Exchange, & Lymphatic System

• School: UTSG
• Department: Physiology
• Course: PSL301H1
• Professor: Michelle French

Document Summary

Lecture 13 exercise, capillary exchange, and the lymphatic system. Blood flow is distributed differently at rest than during exercise. Bod(cid:455) has a (cid:449)ide (cid:448)a(cid:396)iet(cid:455) of (cid:396)espo(cid:374)ses to e(cid:454)e(cid:396)(cid:272)ise, (cid:271)ut (cid:449)e(cid:859)ll fo(cid:272)us o(cid:374) the cv s(cid:455)ste(cid:373)(cid:859)s a(cid:272)(cid:272)o(cid:373)(cid:373)odatio(cid:374)s to e(cid:454)e(cid:396)(cid:272)ise. Skeletal muscles milk blood back towards the heart, so automatically exercise mediates increased venous return. Simultaneously, we increase sympathetic activity as a result of neuromuscular activity, activated at cvcc: adaptation in exercise, because if we delivered a lot of blood to the heart, we may overstretch the heart and starling forces. By activating sympathetic output, we bring heart beats closer together, and reduce time in diastole and systole (increase hr) At rest, skeletal muscle gets 21% of total blood flow. During exercise, skeletal muscle gets 88% of total blood flow. If your skeletal muscle is taking increased (cid:272)a(cid:396)dia(cid:272) output, (cid:455)ou(cid:859)(cid:396)e gi(cid:448)i(cid:374)g up so(cid:373)ethi(cid:374)g.