Lecture+notes+15 - Copy - Lecture Notes Bio 109 Fall 2010...

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Lecture Notes Bio 109, Fall 2010, Dr. Catherine Loudon Lecture 15 – 10/29/10 – Cardiac cycles, regulation of cardiac output 1) Your question– Do we have to know all of the parts of an ECG (P, Q, R, S, T) and what they represent? No – just P and R (atrial and ventricular depolarizations, respectively) 2) Discussed abnormal ECGs in Fig. 14-23 3) Clicker question – answer counts (10 am) Heart muscle cells get their oxygen a) directly from the blood inside the heart. b) from coronary arteries. (correct answer) c) from coronary veins. d) from pulmonary arteries. e) from pulmonary veins. 4) Clicker question – answer counts (11 am) The average blood pressure is highest in the a) aorta (correct answer) b) arteries c) arterioles d) capillaries e) veins 5) Terminology of cardiac cycle (Fig. 14-24) a) Diastole – cardiac muscle is relaxing b) Systole – cardiac muscle is contracting c) Systole of atria and ventricles at different times 6) Pressure/volume changes in ventricles during cardiac cycle (Fig. 14-25) a)
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  • Spring '10
  • CatherineLoudin
  • Physiology, heart rate

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