A&P Ch5 terms

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A&P Ch5 terms
2012-12-08 19:57:03

vital vocabulary for the circulatory system
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  1. the early phase of repolarization in which the cell contains such a large concentration of ions that it cannot be stimulated to depolarize
    absolute refractory period
  2. the pressure in the aorta against which the left ventricle must pump blood
  3. leukocytes that lack granules
  4. stimulation of aplha receprtors that results in vasoconstriction
    alpha effect
  5. a decrease in the number of red blood cells, for any reason
  6. one of the two branches of the left main coronary artery
    anterior descending coronary artery
  7. proteins within plasma that react with antigens
  8. substances on the surface of erythrocytes that are recognized by the immune system
  9. the largest artery in the body, which carries oxygenated blood from the left ventricle to the entire body
  10. one of the three described portions of the aorta; the section of the aorta betweeen the ascending and descending portions that gives rise to the right brachiocephalic (innominate), left common carotid, and left subclavian veins
    aortic arch
  11. the semilunar valve that regulates blood flow from the left ventricle to the aorta
    aortic valve
  12. the blood vessels that carry blood away from the heart
  13. the deposition of calcium in the arterial walls that results in a loss of elasticity and concomitant reduction in blood flow
  14. the first of thre portions of the aorta; originates from the left ventricle and gives rise to two branches, the right and left main coronary arteries
    ascending aorta
  15. a disorder characterized by the formation of plaques of material, mostly lipids and cholesterol, on the inner arterial walls
  16. the site located in the right atrium adjacent to the septum that is responsible for transiently slowing electrical conduction
    atrioventricular (AV) node
  17. the two valves through which blood flows from the atria to the ventricles
    atrioventricular valves
  18. one of the two chambers in the heart that receives blood back from the body
  19. the ability of cardiac cells to generate an impulse to contract even when there is no external nervous stimulus
  20. the vein that is formed from the combination of the basilic and cephalic veins; it drains into the subclavian
    axillary vein
  21. receptors in the blood vessels, kidneys, brain, and heart that respond to changes in pressure in the heart or main arteries to help maintain homeostasis
  22. the artery that is formed when the left and right vertebral arteries unite after entering the brain through the foramen magnum
    basilar artery
  23. one of the two major veins of the arm, it combines with the cephalic vein to form the axillary vein
    basilic vein
  24. the least common of all granulocytes; they are important in both allergic and inflammatory reactions
  25. stimulation of beta receptors that results in increased inotropic, dromotropic, and chronotropic states
    beta effect
  26. a waste product of red blood cell destruction that undergoes further metabolism in the liver
  27. the fluid tissue that is pumped by the heart through the arteries, veins and capillaries and consists of plasma and formed elements or cells, such as red blood cells, white blood cells, and platelets
  28. an abnormal "whooshing-like" sound indicating chaotic blood flow
  29. part of the conduction system of the heart; a continuation of the atrioventricular node
    bundle of His
  30. thin-walled vessels that allow oxygen and nutrients to pass out into the cells and allow carbon dioxide and waste products to pass from the cells into the capillaries
  31. the pumping process begins with the onset of myocardial contraction and ends with the beginning of the next contraction
    cardiac cycle
  32. expressed as liters per minute, the amount of blood pumped through the circulatory system in minute
    cardiac output
  33. a life-threatening state of shock that develops as a result of a large pericardial effusion
    cardiac tamponade
  34. the point of division at which the common carotid artery branches at the angle of the mandible into the internal and external carotid arteries
    carotid bifurcation
  35. an opening in the cranial vault through which the carotid arteries enter
    carotid canals
  36. a slight dilation in the carotid bifurcation that contains structures that are important in the regulation of blood pressure
    carotid sinus
  37. one of the two major veins of the arm that combine to form the axillary vein
    cephalic vein
  38. the part of the brain that is located dorsal to the pons and is responsible for coordination and balance
  39. the arteries that supply blood to large portions of the cerebral cortex of the brain
    cerebral arteries
  40. receptors in the blood vessels, kidneys, brain, and heart that respond to changes in chemical composition of the blood to help maintain homestasis
  41. small muscular strands that attache the ventricles and the valves, preventing regurgitation of blood through the valves from the ventricles to the atria
    chordae tendineae cordis
  42. related to the control of the heart's rate of contraction
    chronotropic state
  43. an interconnection of the anterior cerebral arteries and the anterior communicating artery, which forms an important source of collateral circulation to the brain
    circle of Willis
  44. one of the two branches of the left main coronary artery
    circumflex coronary artery
  45. a group of complex electrical tissues within the heart that initiate and transmit stimuli that result in contractions of myocardial tissue
    conduction system
  46. the ability of cardiac cells to conduct electrical impulses
  47. the strength of heart muscle contraction
  48. arteries that arise from the aorta shortly after it leaves the left ventricle and supply the heart with oxygen and nutrients
    coronary arteries
  49. the condition that results when either atherosclerosis or ateriosclerosis is present in the arterial walls
    coronary artery disease (CAP)
  50. veins that collect blood that is returning from the walls of the heart
    coronary sinus
  51. the flaps that comprise the heart valves
  52. the process of elctrical discharge and flow of electrical activity from a cell
  53. one of the three portions of the aorta, it is the longest portion and extends through the thorax and abdomen into the pelvis
    descending aorta