Sonosim Lungs Questions and Answers Already Passed

Sonosim Lungs Questions and Answers Already Passed Thoracic cavity expansion results in generation of negative intrathoracic pressure, which draws atmospheric air in through the mouth and nose into the lungs. A. True B. False A. True Correct. Inhalation relies upon active expansion of the thoracic cavity. Thoracic cavity expansion is driven via the diaphragm, external intercostal muscles, and several accessory muscles. Diaphragmatic excursion generates a majority of inspiratory force. Thoracic cavity expansion results in generation of negative intrathoracic pressure, which draws atmospheric air in through the mouth and nose into the lungs. Exhalation is largely a passive process, driven by the elastic recoil of the lungs, following relaxation of respiratory muscles. Which of the following statements regarding pulmonary blood flow is correct? A. The pulmonary artery contains highly oxygenated blood, delivering it to the left atrium from the lungs. B. Following gas exchange between the alveoli and capillaries, blood travels to the pulmonary venous system. C. Pulmonary veins deliver blood to the heart’s left atrium. D. All of the above E. B and C only E. B and C only Correct. In contrast to other arteries in the body, the pulmonary artery delivers deoxygenated blood. The pulmonary artery receives blood from the heart's right ventricle and delivers it to the left and right pulmonary arteries, which progressively branch into smaller and smaller vessels, ending in the capillaries of the alveolar unit. At this point, gas exchange between the alveolus and capillary occurs, and blood then travels to the pulmonary venous system. This venous oxygenated blood travels from the microscopic venules through progressively enlarging vessels, eventually arriving at the pulmonary veins, which deliver blood to the heart's left atrium. Which of the following correctly characterizes the pleura? A. The parietal pleura is adherent to the inner chest wall. B. The visceral pleura is richly innervated with pain fibers and is quite pain sensitive. C. The visceral pleura is the fibrous layer that adheres to the lung parenchyma. D. All of the above E. A and C only E. A and C only Correct. The parietal pleura is the very thin, pain-sensitive fibrous layer that is adherent to the inner aspect of the chest wall. Immediately deep to the parietal pleura lies the insensate visceral pleura, the very thin fibrous layer that is adherent to the lung parenchyma. Within each hemithorax, the lung is bordered by __________. A. the diaphragm B. the chest wall C. the mediastinum