ch 5

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ch 5
2011-02-01 11:47:41

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  1. blood vessels that transport blood away from the heart
  2. the smallest arteries that transport blood from larger arteries to the capillaries.
  3. the specialized mass of conducting cells in the heart located at the atrioventricular junction
    atrioventricular (AV) node
  4. stretch receptor located within the cardiovascular system that senses changes in blood pressure
  5. a resting heart rate lower than 60 bpm
  6. the smallest vessels transporting blood from the heart to the tissues and the actual sites of exchange between the blood and tissue
  7. the period that includes all events between two consecutive heartbeats
    cardiac cycle
  8. the volume of blood pumped out by the heart per minute. Q = HR X stroke volume.
    cardiac output (Q)
  9. a sensory organ capable of reacting to a chemical stimulus
  10. the lowest arterial pressure, resulting from ventricular diastole (the resting phase)
    diastolic blood pressure
  11. the fraction of blood pumped out of the left ventricle with each contraction, determined by divind stroke volume by end-diastolic volume and expressed as a percentage
    ejection fraction
  12. a recording of the heart's electrical activity
    electrocardiogram (ECG)
  13. the volume of blood remaining in the left ventricle at the end of diastole just before contraction
    end diastolic volume (EDV)
  14. the volume of blood remaining in the left ventricle at the end of systole, just after contraction
    end systolic volume (ESV)
  15. redistribution of blood at the system or body level through neural mechanisms
    extrinsic neural control
  16. the percentage of cells or formed elements in the total blood volume. more than 99% of the cells or formed elements are red blood cells
  17. increased red blood cell concentration by increased production of cells.
  18. the iron-containing pigment in red blood cells that binds oxygen
  19. the average pressure exerted by the blood as it travels through the arteries. it is estimated as follows: MAP = DBP + (0.333 X (SBP - DBP)).
    mean arterial pressure (MAP)
  20. an end organ that responds to changes in mechanical stress, such as stretch, compression, or distension
  21. the muscle of the heart
  22. a double-layered outer covering of the heart
  23. a common cardiac arrhythmia that results in the feeling of skipped or extra beats caused by impulses originating outside the SA node
    premature ventricular contraction (PVC)
  24. the terminal branches if the AV bundle that transmit impulses through the ventricles six times faster than through the rest of the cardiac conduction system
    Purkinje fibers
  25. a group of specialized myocardial cells, located in the wall of the right atrium, that control the heart's rate of contraction; the pacemaker of the heart
    sinoatrial (SA) node
  26. the amount of blood ejected from the left ventricle during contraction; the difference between the end-diastolic volume and the end-systolic volume
    stroke volume (SV)
  27. the greatest arterial blood pressure, resulting from systole (the contracting phase of the heart)
    systolic blood pressure
  28. a resting heart rate greater than 100 bpm
  29. the constriction or narrowing of blood vessels
  30. the dilation or widening of blood vessels
  31. blood vessels that transport blood back to the heart
  32. a serious cardiac arrhythmia in which the contraction of the ventricular tissue is uncoordinated, affecting the heart's ability to pump blood
    ventricular fibrillation
  33. a serious cardiac arrhythmia consistring of three or more consecutive premature ventricular contractions.
    ventricular tachycardia
  34. small vessels that transport blood from the capillaries to the veins and then back to the heart.