Cardiac Muscle

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6 Terms

1
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how many nuclei do cardiac muscle cells have?

one to two - centrally located

2
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intercalated disks

contain desmosomes and gap junctions (critical to heart’s ability to be electrically coupled)

3
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automaticity

nodal cells have ability to stimulate their own APs

4
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source of activating Ca2+

SR and extracellular

5
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site of Ca2+ regulation

troponin

6
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where are sarcomeres and transverse tubules located?

cardiac and skeletal muscle