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Human Biology and Physiology of the Heart

28. The outside layer of the heart
a. fibrous pleura
b. pericardium
c. parietal pleura
d. peritoneum

29. The superior vena cava enters the __________ of the heart.
a. right ventricle
b. right atrium
c. left atrium
d. left ventricle

30. The pulmonary semilunar valve prevents back flow of blood into the _____
a. right atrium
b. left atrium
c. right ventricle
d. left ventricle

31. Which of the following contains blood with a relatively high oxygen content?
a. left ventricle
b. right ventricle
c. right atrium
d. superior vena cava

32. Which of the following contains blood with a relatively low oxygen content?
a. left ventricle
b. aorta
c. pulmonary vein
d. pulmonary artery

33. The highest pressure exerted by the heart is called the________
a. systolic pressure
b. diastolic pressure
c. pulse pressure
d. mean arterial pressure

34. Freshly oxygenated blood enters the heart through the____ and is pumped out the ________.
a. right atrium; aorta
b. left atrium; aorta
c. right ventricle; pulmonary arteries
d. left ventricle; pulmonary arteries

35. The electrical initiation of a heartbeat begins in the ____________chamber wall.
a. left ventricle
b. right ventricle
c. right atrium
d. left atrium

36. The pulmonary semilunar valve prevents a back-flow of blood into the _____
a. pulmonary artery
b. right ventricle
c. left ventricle
d. right atrium

37. The aortic semilunar valve prevents blood from returning to the ______
a. left ventricle
b. aorta
c. right ventricle
d. left atrium

38. Blood in all veins is relatively low in oxygen.
a. True
b. False

39. When an atrium is in systole the ventricle is in diastole.
a. True
b. False

40. Since atria always receive blood, the vessels attached to them are all termed veins.
a. True
b. False

41. The tricuspid valve prevents a back flow of blood into the right atrium.
a. True
b. False

42. During the contraction of the ventricles, all of the heart valves close.
a. True
b. False

43. Most of the average adult heart lies to the left of the midline.
a. True
b. False

44. The right and left sides of the heart are separated by the septum.
a. True
b. False

45. These cells function in immune responses in the blood.
a. Red blood cells
b. Leucocytes
c. Platelets
d. Thrombocytes

46. Which of the following is NOT true concerning O blood?
a. Universal donor
b. Has antigens A and B
c. Most common
d. Contains recessive genes

47. The cardiovascular system meets the lymphatic system at the _________.
a. veins
b. arteries
c. capillaries
d. lungs

48. When should an expecting Rh-- mother be concerned of Erythroblastosis Fetalis?
a. pregnancy of her second Rh- child.
b. pregnancy of her first Rh+ child.
c. pregnancy of her first Rh- child.
d. pregnancy of her second Rh+ child.

49. Blood contains over ½
a. plasma
b. erythrocytes
c. leucocytes
d. thrombocytes

50. George's blood pressure is 130/90. What does the 130 represent?
a. ventricles at rest
b. ventricles contracting
c. pulse pressure
d. diastolic pressure

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(28)---b (34)---b (40)---a ...

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