Chapter 19-Cardiac Tissue and Conduction System

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Across
  1. 2. volume of blood ejected by the ventricle during each contraction
  2. 4. Phase of heart when the chambers are relaxed
  3. 5. Abnormally Fast Heartbeat
  4. 7. inflammation of the membrane the surrounds and protects the heart
  5. 9. a composite record of action potentials produced by all the heart muscle fibers during each heartbeat
  6. 10. Junction between heart muscle fibers in which action potentials conduct
  7. 12. time period in which a second contraction of the cardiac muscle cannot be triggered;lasts longer than the contraction itself
  8. 13. Node that normally starts the cardiac excitation;do not have a stable resting potential
  9. 14. term used to describe a group of specialized cardiac muscle fibers that are self excitable
  10. 15. volume remaining in each ventricle at the end of systole
Down
  1. 1. Pathway that sends oxygen poor blood through the lungs and back to the left atrium
  2. 3. stage of acion potential where maintained depolarization is due to slow voltage gated Ca2+ channels
  3. 6. stage of action potential of the heart in which contractile fibers are brought to threshold by open voltage gated fast NA+channels
  4. 8. A narrowing of a heart vlave opening that restricts blood flow
  5. 11. Failure of the myocardium to contract
  6. 14. Neurotransmitter released at the parasympathetic system at the heart