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EMT CHAPTER 11 FINAL SCRIPT 2026 FULLY
SOLVED ANSWER COLLECTION
โ You are performing bag-mask ventilations with oxygen connected and set at a flow rate of 15 L/min. What percentage of oxygen are you delivering? Select one: A. Nearly 100% B. 65% C. 55% D. 45% Answer: A. Nearly 100% โ The purpose of the pin-indexing system for compressed gas cylinders is to: Select one: A. help you determine what type of oxygen regulator to use. B. ensure that the correct regulator is used for the cylinder. C. prevent destroying or stripping the threads on the cylinder. D. reduce the cylinder pressure to a safe and more useful range. Answer: B. ensure that the correct regulator is used for the cylinder.
โ Central chemoreceptors located in the medulla provide feedback to increase the rate and depth of breathing when they sense: Select one: A. slight increases in carbon dioxide or a decrease in the pH of the cerebrospinal fluid. B. decreased levels of oxygen in the blood and an increase in the pH of the cerebrospinal fluid. C. slight decreases in carbon dioxide and an increase in the pH of the cerebrospinal fluid. D. increased levels of oxygen in the blood and a decrease in the pH of the cerebrospinal fluid. Answer: A. slight increases in carbon dioxide or a decrease in the pH of the cerebrospinal fluid. โ Which of the following statements regarding positive-pressure ventilation is correct? Select one: A. Unlike negative-pressure ventilation, positive-pressure ventilation does not affect the esophageal opening pressure. B. To prevent hypotension, the EMT should increase the rate and force of positive-pressure ventilation. C. With positive-pressure ventilation, more volume is required to have the same effects as normal breathing. D. Positive-pressure ventilation allows blood to naturally be pulled back to the heart from the body.
Select one: A. blood coming from the right side of the heart bypasses nonfunctional alveoli and returns to the left side of the heart in an unoxygenated state. B. a decrease in respiratory rate and depth causes carbon dioxide accumulation in the alveoli and an overall decrease in blood oxygen levels. C. the presence of pulmonary surfactant causes a decrease in alveolar surface tension, thus impairing the exchange of gases in the lungs. D. any impairment in circulatory function causes a reduced ability for oxygen and carbon dioxide to diffuse across the alveolar- capillary membrane. Answer: A. blood coming from the right side of the heart bypasses nonfunctional alveoli and returns to the left side of the heart in an unoxygenated state. โ Prior to applying a nonrebreathing mask to a patient, you must ensure that the: Select one: A. flow rate is set at 6 L/min. B. patient has reduced tidal volume. C. reservoir bag is fully inflated. D. one-way valve is sealed. Answer: C. reservoir bag is fully inflated.
โ While providing CPAP to a patient in severe respiratory distress, you note that his heart rate has increased by 20 beats/min. He is conscious, but is no longer following verbal commands. You should: Select one: A. remove the CPAP device and ventilate him with a bag-mask device. B. decrease the amount of pressure that the CPAP device is delivering. C. remove the CPAP device and apply oxygen by nonrebreathing mask. D. increase the amount of pressure that the CPAP device is delivering. Answer: A. remove the CPAP device and ventilate him with a bag- mask device. โ To select the proper size oropharyngeal airway, you should measure from the: Select one: A. center of the mouth to the posterior ear. B. corner of the mouth to the earlobe. C. angle of the jaw to the center of the mouth. D. corner of the mouth to the superior ear. Answer: B. corner of the mouth to the earlobe.
A. Apnea B. Blood loss C. Croup D. Hypoxia Answer: C. Croup โ The process of exchanging oxygen and carbon dioxide between the alveoli and the blood of the capillaries is called: Select one: A. external respiration. B. alveolar ventilation. C. pulmonary ventilation. D. cellular metabolism. Answer: A. external respiration. โ An adult at rest should have a respiratory rate that ranges between: Select one: A. 8 and 15 breaths/min. B. 22 and 24 breaths/min. C. 12 and 20 breaths/min. D. 10 and 18 breaths/min.
Answer: C. 12 and 20 breaths/min. โ High-flow oxygen with a nasal cannula during the preoxygenation phase of endotracheal intubation is called: Select one: A. denitrogenation. B. apneic oxygenation. C. passive ventilation. D. active ventilation. Answer: B. apneic oxygenation. โ An oxygen cylinder should be taken out of service and refilled when the pressure inside it is less than: Select one: A. 1,500 psi. B. 500 psi. C. 200 psi. D. 1,000 psi. Answer: B. 500 psi. โ Gas exchange in the lungs is facilitated by: Select one:
Answer: D. Cheyne-Stokes respirations. โ Oxygen toxicity is a condition in which: Select one: A. decreased levels of oxygen in the blood result in free radical production. B. cellular tissue damage occurs from excessive oxygen levels in the blood. C. excessive blood oxygen levels cause the hypoxic patient to stop breathing. D. significantly low levels of oxygen in the blood damage the cellular tissue. Answer: B. cellular tissue damage occurs from excessive oxygen levels in the blood. โ Structures of the lower airway include all of the following, EXCEPT: Select one: A. alveoli. B. the epiglottis. C. the trachea. D. bronchioles. Answer: B. the epiglottis.
โ The diaphragm is innervated by the _________ nerve, which allows it to contract. Select one: A. vagus B. vestibulocochlear C. hypoglossal D. phrenic Answer: D. phrenic โ The hypoxic drive is influenced by: Select one: A. high blood oxygen levels. B. high blood carbon dioxide levels. C. low blood oxygen levels. D. low blood carbon dioxide levels. Answer: C. low blood oxygen levels. โ The presence of elevated carbon dioxide levels in the blood is called: Select one: A. hypoxia.
Answer: B. 2, โ Which of the following structures is NOT found in the upper airway? Select one: A. Bronchus B. Larynx C. Oropharynx D. Pharynx Answer: A. Bronchus โ What is the MOST common cause of airway obstruction in an unconscious patient? Select one: A. The tongue B. Vomitus C. Blood clots D. Aspirated fluid Answer: A. The tongue โ Which of the following patients is breathing adequately? Select one:
A. A conscious male with respirations of 18 breaths/min and reduced tidal volume B. A conscious male with respirations of 19 breaths/min and pink skin C. An unconscious 52-year-old female with snoring respirations and cool, pale skin D. A conscious female with facial cyanosis and rapid, shallow respirations Answer: B. A conscious male with respirations of 19 breaths/min and pink skin โ Which of the following factors will cause a reduction in minute volume in an adult? Select one: A. Increased tidal volume B. Shallow breathing C. Respirations of 20 breaths/min D. Slight increase in respiratory rate Answer: B. Shallow breathing โ Which of the following oxygen flowmeters is NOT affected by gravity and can be used in any position when attached to an oxygen cylinder? Select one:
