Z331 Fall 2010 Ecampus Week 7 Cardiac and Smooth Muscle Posted

Z331 Fall 2010 Ecampus Week 7 Cardiac and Smooth Muscle Posted

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Week 7: Lecture 3: Chapter 10 –   Muscular Tissue: Cardiac and Smooth  Muscle
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Cardiac tissue ***note – not similar scales*** Figure 10–22, 317 Figure 10–3, 287
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Characteristics of Cardiac  Tissue cardiac muscle cells  ( cardiocytes or cardio  myocytes ): are small have a single nucleus have short, wide T tubules have SR  are aerobic  have intercalated discs Figure 10–22,  317 Fig. 19.13, Saladin, 4 th ed
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Intercalated  Discs  Are specialized  contact points  between cardiocytes Join cell membranes  of adjacent  cardiocytes (gap  junctions,  desmosomes)  Figure 4–2, 109 Gap Junction Desmosome Fig. 19.13, Saladin, 4 th ed
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link heart cells  mechanically,  chemically, and  electrically, the  heart functions  as a  functional  syncytium Figure 20-5, 674
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4 Major Functional Specialties of Cardiac  Tissue 1. Automaticity  (autorhythmicity): contraction without neural  stimulation controlled by pacemaker  cells 2. Variable contraction  controlled by nervous system other factors Figure 20-12, 685 http://www.cvphysiology.com/
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This note was uploaded on 02/15/2011 for the course ZOOLOGY 331 taught by Professor Amyharwell during the Fall '10 term at Oregon State.

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Z331 Fall 2010 Ecampus Week 7 Cardiac and Smooth Muscle Posted

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