Respiratory HW True/False – Flashcards
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Atelectasis (lung collapse) renders the lung useless for ventilation.
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True
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The average individual has 500 ml of residual volume in his lungs.
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False
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During normal quiet breathing, approximately 750 ml of air moves into and out of the lungs with each breath.
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False
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The structures within the respiratory system's conducting zone include the trachea and the paranasal sinuses.
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True
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Dalton's law states that the total pressure exerted by a mixture of gases is the sum of the pressures exerted independently by each gas in the mixture.
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True
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Emphysema is distinguished by permanent shrinkage of the alveoli.
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False
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Although lung cancer is difficult to cure, it is highly preventable.
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True
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Labored breathing is termed dyspnea.
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True
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Respiratory rate is lowest in newborn infants.
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True
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Dalton's law of partial pressures states that when a gas is in contact with a liquid, that gas will dissolve in the liquid in proportion to its partial pressure.
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False
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The Hering-Breuer reflex is a potentially dangerous response that may cause overinflation of the lung.
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False
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The alveoli are also known as alveolar sacs.
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False
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Dalton's law of partial pressures states that the total pressure exerted by a mixture of gases is the sum of the pressures exerted independently by each gas in the mixture.
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True
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As carbon dioxide enters systemic blood, it causes more oxygen to dissociate from hemoglobin (the Haldane effect), which in turn allows more CO2 to combine with hemoglobin and more bicarbonate ion to be generated (the Bohr effect).
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False
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Under certain conditions, the vocal folds act as a sphincter that prevents air passage.
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True
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Nasal conchae mainly work on inhalation to warm and moisten air. They serve minor functions for exhalation.
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False
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The parietal pleura lines the thoracic wall.
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True
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Tracheal obstruction is life threatening.
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True
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Smoking diminishes ciliary action and eventually destroys the cilia.
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True
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Valsalva's maneuver involves closing off the glottis (preventing expiration) while contracting the muscles of expiration, causing an increase in intra-abdominal pressure.
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True
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The epiglottis is a smooth muscle that covers the glottis during swallowing.
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False
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The lungs are perfused by two circulations: the pulmonary and the bronchial. The pulmonary circulation is for oxygenation of blood. The bronchial circulation supplies blood to the lung structures (tissue).
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True
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The functions of the nasal conchae are to enhance the air turbulence in the cavity and to increase the mucosal surface area exposed to the air.
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True
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The olfactory mucosal lining of the nasal cavity contains the receptors for the sense of smell.
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True
