BIOC33H3 : STUDY GUIDE LECTURES 1-12

• School: UTSC
• Department: Biological Sciences
• Course: BIOC33H3
• Professor: Stephen Reid

Document Summary

Answers to study guide questions: lecture 1-12 (2013) The action potential that travels along the conduction pathway of the heart moves upward into the ventricles (from the apex of the heart) via the : av node, sa node, purkinje fibres, atrioventricular valves, bundle of his. Lecture 2: cardiac action potential and the electrocardiogram. The p and t waves of the ecg represent and , respectively: ventricular repolarisation and atrial depolarisation, atrial depolarisation and atrial repolarisation, ventricular depolarisation and atrial repolarisation, atrial depolarisation and ventricular repolarisation, atrial depolarisation and ventricular depolarisation. The following ecg trace is representative of what cardiac disorder: atrial flutter, atrial fibrillation, ventricular fibrillation, wandering atrial pacemaker, second degree heart block. Lecture 3: ecgs, electrical axis of the heart and the cardiac cycle. During iso-volumetric contraction of the heart: there is an increase in pressure without a change in volume, the semilunar valves are closed, the av valves are closed, a and b, a, b and c.