The Mammalian and Amphibian Cardiovascular Systems

The Mammalian and Amphibian Cardiovascular Systems - Goals...

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Goals of Lab 5: Understand the electrical activity of the heart Understand the mechanical activity of the heart Understand excitation-contraction coupling of cardiac muscle Understand effective and relative refractory periods in cardiac muscle Know about premature ventricular or extrasystolic contractions and the compensatory pause Understand autonomic input and it’s effects on the heart Understand the role of primary and secondary pacemakers
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Mechanical Properties of the Heart The heart generates pressure to eject blood ( stroke volume ) repeatedly ( heart rate ) to meet the blood flow demands of the body ( cardiac output ) Stroke volume is determined by the preload , the afterload , and the myocardial contractility Heart rate is determined by pacemaker cells and is influenced by autonomic input and intrinsic input Electrical signals start in the pacemaker cells and travel through gap junctions of the myocardial cells, causing contraction through excitation-contraction
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This note was uploaded on 04/05/2011 for the course NPB 101L taught by Professor Goldberg during the Spring '08 term at UC Davis.

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The Mammalian and Amphibian Cardiovascular Systems - Goals...

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