EXCITATION-CONTRACTION COUPLING Release of Ca2+ from the SR

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1) Action potential runs along _________ and continues into _________.

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sarcolemma, T-tubules

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2) Action potential triggers __________ from sarcoplasmic reticulum

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release of Ca2+

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5 Terms

1
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1) Action potential runs along _________ and continues into _________.

sarcolemma, T-tubules

2
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2) Action potential triggers __________ from sarcoplasmic reticulum

release of Ca2+

3
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3) Ca2+ diffuses into _________ and ________

myofibrils, sarcoplasm

4
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4) Ca2+ binds to _______ on thin filament

  • Myosin-binding sites on actin get exposed

troponin

5
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5) Crossbridges form

tension is generated (starts contraction)