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5. Stand straight with your eyes closed and exhale all the air. Inhale deeply and hold the breath while the white light is on. Getting an accurate representation of the lung volume is essential because people tend to force expiration to get the most accurate tidal volume. Take several measurements and average the numbers. Note that some handheld spirometers are not very sensitive and may give a lower value for the tidal volume. If you suspect this is the case, take additional readings to get a more accurate measurement. Measurement 1: 550mL Measurement 2: 520mL Measurement 3: 470mL Average Tidal Volume: 513.33 mL 4. Measure the expiratory reserve volume: Before taking this measurement, inhale and exhale a series of tidal volumes. Then take a normal tidal inspiration, breathe out a normal tidal expiration, place the mouthpiece in your mouth, and exhale as forcefully as possible. Do not cheat by taking a large breath first! As before, perform several measurements. 

          5. Stand straight with your eyes closed and exhale all the air. Inhale deeply and hold the breath while the white light is on. Getting an accurate representation of the lung volume is essential because people tend to force expiration to get the most accurate tidal volume. Take several measurements and average the numbers. Note that some handheld spirometers are not very sensitive and may give a lower value for the tidal volume. If you suspect this is the case, take additional readings to get a more accurate measurement.

Measurement 1: 550mL
Measurement 2: 520mL
Measurement 3: 470mL
Average Tidal Volume: 513.33 mL

4. Measure the expiratory reserve volume: Before taking this measurement, inhale and exhale a series of tidal volumes. Then take a normal tidal inspiration, breathe out a normal tidal expiration, place the mouthpiece in your mouth, and exhale as forcefully as possible. Do not cheat by taking a large breath first! As before, perform several measurements.
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Biology for AP Courses
Biology for AP Courses
Julianne Zedalis, John Eggebrecht
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5. Stand straight with your eyes closed and exhale all the air. Inhale deeply and hold the breath while the white light is on. Getting an accurate representation of the lung volume is essential because people tend to force expiration to get the most accurate tidal volume. Take several measurements and average the numbers. Note that some handheld spirometers are not very sensitive and may give a lower value for the tidal volume. If you suspect this is the case, take additional readings to get a more accurate measurement. Measurement 1: 550mL Measurement 2: 520mL Measurement 3: 470mL Average Tidal Volume: 513.33 mL 4. Measure the expiratory reserve volume: Before taking this measurement, inhale and exhale a series of tidal volumes. Then take a normal tidal inspiration, breathe out a normal tidal expiration, place the mouthpiece in your mouth, and exhale as forcefully as possible. Do not cheat by taking a large breath first! As before, perform several measurements.
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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 inhaled with forced inspiration and expiration H. Volume of air exchanged with normal, quiet breath Respiratory System Physiology

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The tidal volume is defined as the volume of air that is inhaled in one breath. For the average adult this is approximately 500 ml. On average, a resting adult takes about 12 breaths per minute. What is the total mass of air inhaled in a minute on a day when the local temperature is 25°C with 50% humidity and an atmospheric pressure of 98 kPa?

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Transcript

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00:01 So, the first part is the pulmonary ventilation is best defined as the option number b is the correct one.
00:08 If we talk about the pulmonary ventilation, the literal meaning of pulmonary ventilation is explained by option number b, which says that this is a physical movement of air in and out of the lungs.
00:20 So, when it is moving in and out of the lungs, this is known as the pulmonary ventilation.
00:25 So, option number b is the correct one.
00:27 The second part is, according to the boyle's law, so according to the boyle's law, it is saying, it is saying that the pressure is actually inversely related to that of volume.
00:39 So, that means if the pressure is going to increase, the volume is going to decrease or it is vice versa...
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