Check Your Recall 1 Pulmonary ventilation is best defined as a. the movement of gases across the respiratory membrane. b. the exchange of gases between the blood in the systemic capillaries and the tissues. c. the physical movement of air into and out of the lungs. d. the movement of gases through the blood. 2 How are pressure and volume related, according to Boyle's law? 3 Air moves out of the lungs when a. intrapulmonary pressure is less than atmospheric pressure. b. intrapulmonary pressure is greater than atmospheric pressure. c. blood pressure is greater than intrapulmonary pressure. d. blood pressure is less than intrapulmonary pressure. 4 Passive expiration is achieved primarily by the a. contraction of the diaphragm and external intercostal muscles. b. decrease in intrapulmonary pressure. c. increase in atmospheric pressure. d. elastic recoil of the lungs. 5 Matching: Match the following pulmonary volumes and capacities with their correct definition or description. Total lung capacity Residual volume Functional residual capacity Vital capacity Inspiratory reserve volume Tidal volume Inspiratory capacity Expiratory reserve volume A. Volume of air in the lungs after a tidal expiration B. Volume of air forcibly expired after a tidal expiration C. Volume of air forcibly inspired after a tidal inspiration D. Total amount of exchangeable and nonexchangeable air in the lungs E. Maximum amount of air that can be inhaled with a forced inspiration F. Volume of air remaining in the lungs after forceful expiration G. Maximum amount of exchangeable air that can be vented with forced inspiration and expiration H. Volume of air exchanged with normal, quiet breathing
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Pulmonary ventilation is the physical movement of air into and out of the lungs; it is not gas exchange across membranes or gas transport in blood. Show more…
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PART C: Assessments Match the air volumes in column A with the definitions in column B. Place the letter of your choice in the space provided. CRITICAL THINKING ASSESSMENT To determine possible obstruction of the airway, a forced expiratory volume (FEV) may be measured. Under normal circumstances, a healthy adult can expel 75% to 85% of the vital capacity in 1.0 second. Predict how this would change in a person who has asthma, and explain your reasoning.
Adi S.
Activity 26.4: Compare predicted and actual vital capacities and examine the differences between the two. Activity 26.5: Measure respiratory volumes using the Biopac Student Activity. Activity 26.6: Calculate respiratory volumes that cannot be directly measured with a handheld spirometer. PRE-LAB QUIZ Before you begin, read all the activities in Exercise 26 and the required material in your textbook that is assigned by your instructor. 1. During this laboratory exercise, you will study the function of the pleural membranes. What will you use to represent the pleural membranes? 2. True or False: Air flows into the lungs when intrapulmonary pressure is less than atmospheric pressure. 3. True or False: The abdominal muscles are involved in forced inhalation. 4. During this laboratory exercise, you will use a handheld spirometer to measure respiratory volumes. 5. True or False: In general, vital capacity increases with age and decreases with height. 6. The volume of air that enters the alveolar airways each minute is called the minute ventilation. 7. True or False: The anatomic dead space refers to the volume of inhaled air that enters the alveoli. 8. During a period of hyperventilation, the carbon dioxide levels in body fluids decrease; increase. 9. True or False: One respiratory cycle equals one normal inhalation and one normal exhalation. 10. During Activity 26.5, the Biopac activity in the laboratory exercise, you will connect an airflow transducer. The transducer converts airflow to volume.
Madhur L.
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