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UAB / Biology / BY 490 / which of the following statements describing the mechanics of breathin

which of the following statements describing the mechanics of breathin

which of the following statements describing the mechanics of breathin

Description

School: University of Alabama at Birmingham
Department: Biology
Course: Human Physiology
Professor: Wibbles
Term: Fall 2015
Tags:
Cost: 50
Description: Exercise 7: Respiratory System Mechanics: Activity 1: Measuring Respiratory Volumes and Calculating Capacities Lab Report Pre-lab Quiz Results You scored 100% by answering 5 out of 5 questions correctly
Uploaded: 06/06/2017
6 Pages 570 Views 0 Unlocks
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Exercise 7: Respiratory System Mechanics: Activity 1: Measuring Respiratory Volumes and Calculating Capacities Lab Report Pre-lab Quiz Results You scored 100% by answering 5 out of 5 questions correctly. 1. Which of the following statements describing the mechanics of breathing is false? You correctly answered: d. Ventilation relies exclusively on contracting skeletal muscles. 2. The contraction of which of the following muscles will increase the thoracic cavity volume during inspiration? You correctly answered: c. the external intercostals 3. At the beginning of inspiration, the You correctly answered: b. thoracic cavity volume increases. 4. At the beginning of expiration, the  You correctly answered: a. pressure in the thoracic cavity increases. 5. A tidal volume refers to the You correctly answered: b. amount of air inspired and then expired with each breath under resting conditions. 04/18/17 page 1Experiment Results  Predict Question: Predict Question: Lung diseases are often classified as obstructive or restrictive. An obstructive disease affects airflow,  and a restrictive disease usually reduces volumes and capacities. Although they are not diagnostic, pulmonary function  tests such as forced expiratory volume (FEV1) can help a clinician determine the difference between obstructive and  restrictive diseases. Specifically, an FEV1 is the forced volume expired in 1 second. In obstructive diseases such as chronic bronchitis and asthma, airway radius is decreased. Thus, FEV1 will  Your answer : b. increase proportionately.  Stop & Think Questions: Which muscles contract during quiet expiration? Your answer : c. external and internal intercostal muscles Correct answer: d. None of these muscles contract during quiet expiration. 6. Minute ventilation is the amount of air that flows into and then out of the lungs in a minute. Minute ventilation (ml/min) =  TV (ml/breath) x BPM (breaths/min). Radius Flow (L/min) TV ERV IRV RV VC FEV1 TLC Breath Rate 5.00 7485 499 --- --- --- --- --- --- 15 5.00 7500 500 1200 3091 1200 4791 3541 5991 15 4.50 4920 328 787 2028 1613 3143 2303 4756 15 4.00 3075 205 492 1266 1908 1962 1422 3871 15 3.50 1800 120 288 742 2112 1150 822 3262 15 3.00 975 65 156 401 2244 621 436 2865 15


What happened to the FEV1 (%) as the radius of the airways decreased?




What additional skeletal muscles are utilized in an ERV activity?




What would be an example of an everyday respiratory event the ERV simulates?



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Using the values from the second recorded measurement, enter the minute ventilation in the field below and then click  Submit Data to record your answer in the lab report. You answered: 7500 ml/min 11. A useful way to express FEV1 is as a percentage of the forced vital capacity (FVC). Using the FEV1 and FVC valuesfrom  the data grid, calculate the FEV1 (%) by dividing the FEV1 volume by the FVC volume (in this case, the VC is equal to the  FVC) and multiply by 100%.  Enter the FEV1 (%) for an airway radius of 5.00 mm in the field below and then click Submit Data to record your answer in the lab report. You answered: 74  12. A useful way to express FEV1 is as a percentage of the forced vital capacity (FVC). Using the FEV1 and FVC valuesfrom  the data grid, calculate the FEV1 (%) by dividing the FEV1 volume by the FVC volume (in this case, the VC is equal to the  FVC) and multiply by 100%.  Enter the FEV1 (%) for an airway radius of 3.00 mm in the field below and then click Submit Data to record your answer in the lab report. You answered: 70 Experiment Data: 04/18/17 page 204/18/17 page 304/18/17 page 4Post-lab Quiz Results You scored 100% by answering 5 out of 5 questions correctly. 1. To calculate a person's vital capacity, you need to know the TV, ERV, andYou correctly answered: c. IRV. 2. Measuring a person's FVC means that you are measuring You correctly answered: d. the amount of air that can be expelled when the subject takes the deepest possible inspiration  and then forcefully expires as completely and rapidly as possible. 3. Measuring a person's FEV1 means that you are measuring You correctly answered: b. the amount of the VC that is expired during the first second of the FVC test. 4. For a person suffering an asthma attack, inhaler medications are expected toYou correctly answered: a. reduce the  airway resistance. 5. Which of the following values does not include the ERV? You correctly answered: c. TV 04/18/17 page 5Review Sheet Results 1. What would be an example of an everyday respiratory event the ERV simulates? Your answer: Forced expiration 2. What additional skeletal muscles are utilized in an ERV activity? Your answer: Abdominal muscles and the internal intercostal muscles contract 3. What was the FEV1 (%) at the initial radius of 5.00 mm? Your answer: 73.9% 4. What happened to the FEV1 (%) as the radius of the airways decreased? How well did the results compare with  yourprediction? Your answer: FEV1 decreased with radius decreasing, as predicted 5. Explain why the results from the experiment suggest that there is an obstructive, rather than a restrictive,  pulmonaryproblem. Your answer: In obstructive situation, the radius decreases. As the radius decreased, FEV1 decreases 04/18/17 page 6
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