blood to bypass the liver is the: a. ductus venosus b. ductus arteriosus c. foramen ovale d. both b and c above ANS: A DIF: Memorization REF: Page: 287 TOP: Fetal circulation 32. The structure in the fetus that allows the blood to bypass the lungs is the: a. ductus venosus b. ductus arteriosus c. foramen ovale d. both b and c above ANS: D DIF: Memorization REF: Page: 287|Page: 288 TOP: Fetal circulation 33. Blood pressure is highest in the aorta and lowest in the: a. arterioles b. capillaries c. arteries d. superior and inferior vena cava ANS: D DIF: Memorization REF: Page: 289 TOP: Blood pressure 34. As the viscosity level of the blood: a. decreases, the blood pressure increases b. increases, the blood pressure decreases c. increases, the blood pressure increases d. both a and b above ANS: C DIF: Application REF: Page: 291 TOP: Blood pressure 35. Central venous blood pressure: a. can be almost zero in the inferior vena cava b. is usually 120 mm Hg during systole c. is usually 80 mm Hg during diastole d. both b and c above ANS: A DIF: Application REF: Page: 292 TOP: Fluctuations in blood pressure 36. Which of the following assists in moving venous blood back to the heart? a. contraction of skeletal muscles b. one-way valves in the veins c. the changing pressure in the chest caused by breathing d. all of the above ANS: D DIF: Memorization REF: Page: 293 TOP: Blood pressure 37. Pulse: a. can only be felt in the neck or upper body b. can be felt only in veins c. can be felt only in arteries d. requires that a vein pass over a bone ANS: C DIF: Memorization REF: Page: 293|Page: 294 TOP: Pulse 38. The apical beat can best be heard: a. in the space between the third and fourth rib b. on a line even with the midpoint of the left clavicle c. in the space between the fifth and sixth rib d. both b and c above ANS: D DIF: Memorization REF: Page: 270 TOP: HeartÑLocation, size, and position 39. Which of the following is not true of the atria? a. receive blood from arteries returning to the heart b. are called receiving chambers c. have thinner walls than ventricles d. all of the above are true ANS: A DIF: Memorization REF: Page: 270 TOP: Heart chambers 40. Which of the following is not true of ventricles? a. are called discharging chambers b. pump blood into the arteries c. have thinner walls than atria d. all of the above are true ANS: C DIF: Memorization REF: Page: 270 TOP: Heart chambers 41. The tricuspid valve is located between the: a. left atrium and left ventricle b. right atrium and right ventricle c. right ventricle and the pulmonary artery d. left ventricle and the aorta ANS: B DIF: Memorization REF: Page: 274 TOP: Heart valves 42. Cardiac output is: a. the volume of blood pumped from both ventricles per minute b. the volume of blood pumped from one ventricle per minute c. about 5 liters in the average adult d. both b and c above ANS: D DIF: Memorization REF: Page: 276 TOP: Cardiac cycle 43. Which of the following is not true of arteries? a. They carry blood away from the capillaries. b. They carry blood away from the heart. c. They have thicker tunica media than do veins. d. Their innermost layer is composed of endothelium. ANS: A DIF: Memorization REF: Page: 279|Page: 280 TOP: Blood vessels 44. Which of the following is not true of veins? a. Blood drains into them from venules. b. They carry blood back to the heart. c. They have a thicker tunica media than do arteries. d. Their innermost layer is called the tunica intima. ANS: C DIF: Memorization REF: Page: 279|Page: 280 TOP: Blood vessels 45. Another name for the visceral pericardium is the a. epicardium b. endocardium c. myocardium d. visceral pericardium is not known by another name ANS: A DIF: Memorization REF: Page: 272 TOP: HeartÑCovering sac, or pericardium 46. Another name for the parietal pericardium is the a. epicardium b. endocardium c. myocardium d. parietal pericardium is not known by another name ANS: D DIF: Memorization REF: Page: 272 TOP: HeartÑCovering sac, or pericardium 47. The pericardium is composed of a. muscle tissue b. columnar epithelial tissue c. serous membrane d. fibrous connective tissue ANS: C DIF: Memorization REF: Page: 272 TOP: Covering sac, or pericardium 48. The volume of blood ejected from the ventricles during each beat is called: a. stroke volume b. cardiac output c. cardiac cycle d. both a and b ANS: A DIF: Memorization REF: Page: 276 TOP: Cardiac cycle 49. Blood that has just passed through the bicuspid valve is in the: a. aorta b. right ventricle c. left ventricle d. pulmonary artery ANS: C DIF: Memorization REF: Page: 274 TOP: Blood flow through the heart 50. Blood that has just passed through the bicuspid valve is in the: a. aorta b. right ventricle c. left ventricle d. pulmonary artery ANS: B DIF: Memorization REF: Page: 274 TOP: Blood flow through the heart 51. Blood in the pulmonary artery: a. was ejected from the left ventricle b. is rich in oxygen c. has just passed through a semilunar valve d. all of the above ANS: C DIF: Memorization REF: Page: 274 TOP: Blood flow through the heart 52. Blood in the aorta: a. was ejected form the left ventricle b. is rich in oxygen c. has just passed through a semilunar valve d. all of the above ANS: D DIF: Memorization REF: Page: 274 TOP: Blood flow through the heart 53. Chordae tendineae: a. are attached to the semilunar valves b. are attached to the atrioventricular valves c. are attached to the walls of the atria d. both b and c ANS: B DIF: Memorization REF: Page: 274 TOP: Heart valves 54. Another name for a heart attack is a(n) a. embolism b. angina pectoris c. myocardial infarction d. none of the above ANS: C DIF: Memorization REF: Page: 275 TOP: Blood supply to the heart muscle