Respiratory System
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
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| During forced breathing, which of the following occurs during inhalation? | The expiratory center of the VRG is inhibited.
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| The diaphragm and external intercostal muscles (quiet normal breathing) are controlled by the | DRG
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| Which statement regarding respiration is true? | The sternocleidomastoid muscle works to elevate the rib cage.
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| Which body system, in addition to respiration, does the nasal cavity service? | endocrine
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| Air entering the body is filtered, warmed, and humidified by the | upper (conducting) portion of the respiratory tract.
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| A young teen, balancing precariously on a bridge, topples and falls into icy-cold rushing water. EMT successfully pull him out, and although he is still breathing. What is an expected effect of this disturbance in respiratory equilibrium? | 2. *increased carbon dioxide levels in the cerebrospinal fluid
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| Which of the following factors would increase the amount of oxygen released by hemoglobin from the bloodstream? | decreased pH and increased temperature
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| About how much of the oxygen content of arterial blood consists of oxygen molecules in the plasma (or in solution)? | 1.5%
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| As the diaphragm contracts, all of the following events occur EXCEPT _________. he rib cage is elevated the pressure inside the thoracic cavity decreases below that of atmospheric air exhalation the size of the thoracic cavity increases | exhalation
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| Breathing through the nose rather than breathing through the mouth is advantageous because | air is warmed on inhalation
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| During exhalation, a molecule of carbon dioxide would pass through what structure after the trachea? | larynx
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| Microorganisms removed from incoming air by the mucus of the respiratory tract are ultimately exposed to | stomach acids and enzymes
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| A hyperventilating aspiring actress is breathing with a rate and depth exceeding the demands for oxygen delivery. Which of the following represents a typical homeostatic response to this disturbance of equilibrium? | inhibiton of respiatory muscles
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| Which of the following gases has the highest partial pressure in saturated alveolar air? | nitrogen
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| Which of the following is the correct flow of air being inhaled? | larynx, laryngopharynx, nasopharynx, oropharynx
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| Destruction of the alveolar macrophages would result in _________. | an increased rate of infection
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| Which of the following factors would decrease hemoglobin's affinity for oxygen? | a decrease in the pH of the interstitial fluids
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| Which of the following is NOT a function of the respiratory system? | execretion
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| What drives normal pulmonary ventilation? | volume and pressure changes in the lungs and pleural cavities
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Created by:
iessnorris