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Home Q & A Board Biology-Related Homework Help Medicine Nursing and Clinical
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yaskween2003 yaskween2003
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6 years ago
The process by which an action potential in the plasma membrane of a myocardial cell triggers the events that directly cause contraction of the myocardial cells is referred to as:
 
  a. electrocontraction.
  b. intercalated communication.
  c. excitation-contraction coupling.
  d. myosin communication.
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#1
6 years ago
ANS: C
Excitation-contraction coupling, not electrocontraction, is the process by which an action poten-tial in the plasma membrane of the muscle fiber triggers the cycle, leading to cross-bridge activity and contraction. Neither intercalated nor myosin communication is associated with leading to cross-bridge activity and contraction.
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