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7 Cards in this Set
- Front
- Back
size?
|
cardiac: smaller
skeletal: larger |
|
number of nuclei
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cardiac: 1 or 2
skeletal: many |
|
Ca2+ source?
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cardiac: interstitial fluid and SR
skeletal: SR |
|
what initiates it? (activation)
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cardiac: involuntary and automatic
skeletal: voluntary, motor neurons |
|
contraction? (sustained or tetnus?)
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cardiac: no tetanus
skeletal: sustained contraction |
|
contraction unit?
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cardiac: whole heart acts as a single cell
skeletal: motor units |
|
T-tubules?
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cardiac: 25x's larger in diameter; lines with large amount of mucopolysaccharides with a negative charge to attract Ca2+, can store large amounts of Ca2+, always available
skeletal: smaller diameter |