Cardiac muscle

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Across
  1. 4. resting membrane potential in cardiac muscle
  2. 7. what ion is responsible for the plateau in cardiac muscle AP?
  3. 11. primary ion responsible for AP in a pacemaker cell
  4. 12. location of pacemaker
  5. 13. muscular wall of the heart
  6. 15. ______ cells: capable of forming action potentials
  7. 16. T/F Ca+ binds to Troponin in cardiac excitation-contraction coupling.
  8. 17. the duration of the action potential is the _____ as the duration of its contraction.
  9. 18. T/F Cardiac muscles can have tetanization?
  10. 19. covers the outer surface of the heart; aka visceral pericardium
  11. 20. normal pacemaker of the heart
Down
  1. 1. _____ channels participate in spontaneous depolarization of the pacemaker
  2. 2. mitochondria make up __% of cytoplasm volume in cardiac fibers
  3. 3. ________ cells: contracting heart cells; striated; conduct impulse; atrial and ventricular muscle
  4. 5. compartment in the thoracic cavity that holds the heart
  5. 6. pacemaker Na channels; close during AP
  6. 8. serous membrane forms the outer wall of the heart cavity sac
  7. 9. covers the inner surface of the heart
  8. 10. the myocardium is interconnected by _________ which allow AP to travel easily
  9. 14. ________ cells: conduct action potentials through the heart; create excitatory system that controls rhythmical beating
  10. 17. Atrial cells have ______ action potentials than ventricular cells.