Other questions in this quiz

2. Where does the action potential run in a myofibril?

  • Into the T-Tubules
  • Along the endomysium
  • Into the sarcoplasmic reticulum

3. What is the effect of changing the heart rate by altering cardiac nerve activity or SA node rhythms?

  • Dromotropism
  • Chronotropism
  • Inotropism

4. What is isotropism dependent on?

  • The SA node
  • The autonomic nervous system
  • Calcium ion levels
  • Dromotropism

5. What is the function of myosin light chain kinase?

  • To remove the phosphate group from the myosin light filament
  • Phosphorylation of myosin light filament
  • To move calcium ions out of the sarcoplasm

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