KNES 260 Study Guide - Midterm Guide: Pulmonary Vein, Skeletal Muscle, Diastole

• School: University of Calgary
• Department: Kinesiology
• Course: KNES 260
• Professor: Carol Gibbons Kroeker

Document Summary

Sv is amount of blood pumped per beat. Co is amount of blood pumped per minute. Right atrium, left atrium, right ventricle, left ventricle. Sa node, sends to av node, travels down bundle of his, bundle branches and purkinje fibres. Slow depolarization early = only na+ gates are open. Slow depolarization late = na+ and ca2+ gates open. Fast depolarization = l-type ca2+ gates open, high influx of calcium. So the atria can contract before the ventricles. Name the 3 waves seen in an ecg. T wave = ventricular repolarization (reversed depolarization wave, going in negative direction) Sa node initiation av node bundle of his bundle branches purkinje fibers. What are the four phases of the cardiac cycle: diastolic filling, isovolumic contraction, ejection, isovolumic relaxation. The closing of the mitral valve triggers the beginning of ejection. The closing of the aortic valve triggers the beginning of isovolumic relaxation.