Exam 8: The Respiratory System

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Which factors contribute to maintaining a patent ductus arteriosus during fetal life? I.large amounts of fetal hemoglobin II.low PaO2 III.presence of LDH IV.presence of prostaglandins

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The subdivisions of the pharynx include which of the following? I.nasopharynx II.oropharynx III.laryngopharynx

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How does the lung parenchyma receive most of its oxygen?

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What is the name of the external landmark that identifies the point at which the trachea branches into the right and left mainstem bronchi?

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What external landmark can be used to show the highest point the dome of the right hemidiaphragm reaches in a healthy individual?

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Infants are more susceptible to profound hypoxemia than are adults.

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What can the release of histamine and other chemical mediators from the mast cells in the airways cause? I.bronchoconstriction II.bronchodilation III.vasoconstriction IV.vasodilation

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Approximately what percent of the normal changes in thoracic volume during quiet inspiration is due to the action of the diaphragm?

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What pulmonary disorder could lead to acute flattening of the diaphragm?

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Which of the following describes an acinus?

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What intercommunicating channels permit collateral ventilation between adjacent alveoli and primary lobules? I.bronchial anastomoses II.canals of Lambert III.pores of Kohn IV.terminal bronchioles

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What factor contributes to increased likelihood of an upper airway obstruction in an infant compared to an adult?

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Which of the following statements are true of the pulmonary lymphatic system? I.It consists of both superficial and deep vessels. II.It drains into the right lymphatic or thoracic duct. III.Vessels begin as dead-end lymphatic channels in the lung. IV.With phagocytes, it defends against foreign material.

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What is the primary purpose of the respiratory system?

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What position is used to open the airway in an unconscious patient?

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Why is pulmonary surfactant such an important biologic substance?

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Running vertically down each hemithorax anteriorly is an imaginary line that is used as an anatomical landmark. What is that line called?

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What genetic disorder has been linked to emphysema?

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The pulmonary arterial circulation does which of the following? I.delivers oxygenated blood back to the heart II.delivers unoxygenated blood to the lungs III.originates on the left side of the heart IV.originates on the right side of the heart

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Which of the following describes a function of pulmonary circulation?

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