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7 Cards in this Set

  • Front
  • Back
size?
cardiac: smaller
skeletal: larger
number of nuclei
cardiac: 1 or 2
skeletal: many
Ca2+ source?
cardiac: interstitial fluid and SR
skeletal: SR
what initiates it? (activation)
cardiac: involuntary and automatic
skeletal: voluntary, motor neurons
contraction? (sustained or tetnus?)
cardiac: no tetanus
skeletal: sustained contraction
contraction unit?
cardiac: whole heart acts as a single cell
skeletal: motor units
T-tubules?
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