lecture14nth - What are the events of contraction in a...

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Unformatted text preview: What are the events of contraction in a cardiac muscle cell and how are they different/similar to contraction in skeletal and smooth muscle cells (REVIEW - see Table 12-3)? (Loudon Fall 2010 note-taking helper file) Figure 14-11, step 1 Cardiac muscle - Ca++ involvement in AP lengthens AP (Loudon Fall 2010 note-taking helper file) Figure 14-13 Skeletal vs cardiac muscle - refractory period (Loudon Fall 2010 note-taking helper file) Figure 14-14a Skeletal vs cardiac muscle - refractory period (Loudon Fall 2010 note-taking helper file) Figure 14-14c The cardiac pacemaker cells (autorhythmic) (Loudon Fall 2010 note-taking helper file) Figure 14-15a Electrical activity of the heart starts at the SA node (Loudon Fall 2010 note-taking helper file) Figure 14-17 All cells of the SA node, AV node, and internodal pathways are autorhythmic, so another part can "take over" if the SA node cells are not functional. (Loudon Fall 2010 note-taking helper file) Figure 14-18 ECG single cardiac cell (Loudon Fall 2010 note-taking helper file) Figure 14-22 Ventricles do not completely empty at contraction. Stroke volume is the volume of blood pumped by one ventricle in one contraction. Cardiac output = stroke volume x heart rate (Loudon Fall 2010 note-taking helper file) Figure 14-25 "Starling" curve - the ventricles will contract more forcefully when start contraction more distended (Loudon Fall 2010 note-taking helper file) Figure 14-28 ...
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This note was uploaded on 12/01/2010 for the course BIO SCI Bio Sci E1 taught by Professor Catherineloudin during the Spring '10 term at UC Irvine.

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