Chapter 41: Oxygenation Potter et al.: Fundamentals of Nursing, 9th Edition Complete Answered 100% correctly_ Spring 2023

1. A nurse is teaching staff about the conduction of the heart. In which order will the nurse present the conduction cycle, starting with the first structure? 1. Bundle of His 2. Purkinje network 3. Intraatrial pathways 4. Sinoatrial (SA) node 5. Atrioventricular (AV) node a. 5, 4, 3, 2, 1 b. 4, 3, 5, 1, 2 c. 4, 5, 3, 1, 2 d. 5, 3, 4, 2, 1 ANS: B The conduction system originates with the SA node, the “pacemaker” of the heart. The electrical impulses are transmitted through the atria along intraatrial pathways to the AV node. It assists atrial emptying by delaying the impulse before transmitting it through the Bundle of His and the ventricular Purkinje network. DIF: Understand (comprehension) REF: 875 OBJ: Describe the structure and function of the cardiopulmonary system. TOP: Teaching/Learning MSC: Physiological Adaptation 2. A nurse is teaching the patient with mitral valve problems about the valves in the heart. Starting on the right side of the heart, describe the sequence of the blood flow through these valves. 1. Mitral 2. Aortic 3. Tricuspid 4. Pulmonic a. 1, 3, 2, 4 b. 4, 3, 2, 1 c. 3, 4, 1, 2 d. 2, 4, 1, 3 ANS: C The blood flows through the valves in the following direction: tricuspid, pulmonic, mitral, and aortic. DIF: Understand (comprehension) REF: 874 OBJ: Describe the structure and function of the cardiopulmonary system. TOP: Teaching/Learning MSC: Physiological Adaptation 3. A nurse explains the function of the alveoli to a patient with respiratory problems. Which information about the alveoli’s function will the nurse share with the patient? a. Carries out gas exchange b. Regulates tidal volume c. Produces hemoglobin d. Stores oxygen ANS: A The alveolus is a capillary membrane that allows gas exchange of oxygen and carbon dioxide during respiration. The alveoli do not store oxygen, regulate tidal volume, or produce hemoglobin. DIF: Understand (comprehension) REF: 872-873 OBJ: Describe the physiological processes of ventilation, perfusion, and exchange of respiratory gases. TOP: Teaching/Learning MSC: Physiological Adaptation 4. A nurse auscultates heart sounds. When the nurse hears S2, which valves is the nurse hearing close? a. Aortic and mitral b. Mitral and tricuspid c. Aortic and pulmonic d. Mitral and pulmonic ANS: C As the ventricles empty,