Nervous control of heart

This video will help you tackle with thr concept of nervous control of thr heart. It teaches the effects of sympathetic and parasympathetic nervous systems and how they up or downregulate heart rate. A graphical presentation is also given. Timeline 0:00 Introduction 1:03 Up Regulation of Heart rate 3:00 down and upregulation of L type Ca channels 4:24 Tachycardia 5:18 Down regulation of heart rate 7:45 Bradycardia 8:20 Inhibition of increase heart rate 9:51 Vagus nerve 10:25 Chronotropic effects 11:07 Epinephrine and norepinephrine role in contractile cells 16:55 Graphical representation of extrinsic control 18:35 Refractory period