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A) monocytes.B) polymorphonuclear leukocytes.C) lymphocytes.D) neutrophils.E) basophils.36. Which of these cells is far larger than all the others?37. In hemostasis, thrompoplastin38. When a clot is no longer needed, it is dissolved by
39. The coronary arteries arise fromA) the proximal end of the aorta.B) the interventricular arteries.C) the myocardium.D) the coronary sulcus.E) the venae cavae.40. If the chordea tendinease of an animal's heart were cut the most likely effect would be41. Blood normally leaves the right ventricle through42. A heart rate of 45 bpm and an absence of P waves from electrocardiogram would suggest43. The amount of blood (mL) coming from one ventricle in one heartbeat is calledA) the ejection fraction.B) the preload.C) the afterload.D) the stroke volume.E) the cardiac output.44. Atrial systole begins45. Diastasis is a period of
46. The cardiac center, which modifies the heart rate is located in47. The cardioinhibitory center communicates with the heart by way ofA) the internodal pathways.B) the bundle of His.C) Purkinje fibers.D) the vagus nerves.E) sympathetic nerves.48. At the end of ventricular contraction the amount of blood remaining in the ventricle is49. The heart normal ___54% can rise to as high as 90% during strenuous exercise