Test 5 â Respiratory System - Next2Eden

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6) Which of the following maintains the patency (openness) of the trachea? 6)____________ A. cartilage rings B. pseudostratified ciliated epithelium C. surface tension of water D. surfactant 7) Intrapulmonary pressure is the ______________. 7) ______________ A. pressure within the alveoli of the lungs B. pressure within the pleural cavity C. negative pressure in the intrapleural space D. difference between atmospheric pressure and respiratory pressure 8) Bacteria or other particulate debris contained within inspired air are removed or destroyed by _______. A. mucus B. vibrissae (nose hairs) C. stomach acid D. all of the above 9) The structure at the most posterior aspect of the soft palate which prevents food and liquid from going into the nasal cavity is called the ____________. 9) ___________ A. nasal conchae B. uvula C. Eustachian tube D. posterior nasal aperture 10) Surfactant helps to prevent the alveoli from collapsing by ____________. 10) ____________ A. protecting the surface of alveoli from dehydration and other environmental variations B. interfering with the cohesiveness of water molecules, thereby reducing the surface tension of alveolar fluid C. warming the air before it enters D. humidifying the air before it enters 11) The respiratory membrane ___________. 11) ____________ A. is involved in internal respiration B. is just another name for alveolar tissue C. is the thickness of a piece of tissue paper D. is composed of alveolar epithelial cells and capillary endothelial cells jointly held together by a fused basement membranes 2
12) The function of alveolar type I cells is _____________. 12) _____________ A. to allow rapid diffusion of respiratory gases B. phagocytosis of dust particles C. to produce surfactant D. to adhere to pulmonary capillaries 13) Occasionally food or liquids will “go down the wrong pipe,” initiating a cough reflex. Which structural barrier has been breached if this happens? 13) ___________ A. Laryngopharynx B. Uvula C. Epiglottis D. Glottis 14) Nerve impulses from ________ will result in a regular rhythm of inspiratory and expiratory signals. 14) ____________ A. the preoptic nucleus of the hypothalamus B. the chemoreceptor center C. Broca's center D. the ventral respiratory group 15) In the plasma, the quantity of oxygen in solution is __________. 15) ___________ A. about equal to the oxygen combined with hemoglobin B. greater than the oxygen combined with hemoglobin C. about 1.5% of the total amount of oxygen carried in the blood D. not present except where it is combined with carrier molecules 16) Which of the following is an untrue statement? 16) ____________ A. The largest fraction of carbon dioxide transported in the blood is in the form of bicarbonate. B. Carbon dioxide is transported in the blood by binding hemoglobin at the heme groups. C. Carbonic anhydrase plays a central role in reversibly converting carbon dioxide into carbonic acid. D. The bicarbonate buffer found in blood is a major buffering system in maintaining proper blood pH. 17) During an asthma attack, bronchioles become severely _______. Taking epinephrine causes them to _______. 17) __________ A. constricted; dilate B. dilated; constrict C. mucus-filled; empty of mucus D. both a and c 3
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Page 5 and 6: 24) Infant respiratory distress syn
Page 7 and 8: 36) With regards to the esophagus a
Page 9: 1) D 2) C 3) A 4) C 5) A 6) A 7) A

Test 5 â Respiratory System - Next2Eden

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Test 5 â Respiratory System - Next2Eden