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2.1 Explain why the amount of air taken up into the lungs increases after exercise (3) 2.2 Describe the changes that took place in the human body to bring about an increase in the breathing rate of the person. (3)

2.1 Explain why the amount of air taken up into the lungs increases after exercise (3) 2.2 Describe the changes that took place in the human body to bring about an increase in the breathing rate of the person. (3)

Biology: The Dynamic Science (MindTap Course List)
Biology: The Dynamic Science (MindTap Course List)
4th Edition
ISBN:9781305389892
Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan
Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan
Chapter7: Cellular Respiration: Harvesting Chemical Energy
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Problem 13TYK: 13. There are several ways to measure cellular respiration experimentally. For example, CO2 and...
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Section B: (Minds-on) An experiment was carried out on a person in which the volume of the air taken in at each breath, and the number of breaths per minute were measured at rest and after running. The results are shown in the following table: Breaths per minute Volume of air per breath 450 cm3 At rest 20 After running 1 000 cm3 38 2.1 Explain why the amount of air taken up into the lungs increases after exercise (3) 2.2 Describe the changes that took place in the human body to bring about an increase in the breathing rate of the person. 2.3Twenty percent of the air breathed in consists of oxygen. Sixteen (3) percent of the air breathed out, consists of oxygen. Calculate the amount of oxygen entering the blood per breath after running. Show all calculations. (4)
Transcribed Image Text:Section B: (Minds-on) An experiment was carried out on a person in which the volume of the air taken in at each breath, and the number of breaths per minute were measured at rest and after running. The results are shown in the following table: Breaths per minute Volume of air per breath 450 cm3 At rest 20 After running 1 000 cm3 38 2.1 Explain why the amount of air taken up into the lungs increases after exercise (3) 2.2 Describe the changes that took place in the human body to bring about an increase in the breathing rate of the person. 2.3Twenty percent of the air breathed in consists of oxygen. Sixteen (3) percent of the air breathed out, consists of oxygen. Calculate the amount of oxygen entering the blood per breath after running. Show all calculations. (4)
3. The graph below illustrate the intake of air by an athlete during rest, then during a period of vigorous activity and then during rest after the vigorous activity. Study it and answer the questions based on it. 40 35 30 25 20 15 10 1 2 3 456 789 10 11 12 15 14 15 16 17 12 19 20 Time (minutes) 3.1 Determine the maximum volume of the air breathed in during the period of rest for each minute? (1) 3.2What is the maximum amount of air taken in during the period of vigorous activity? (1) 3.3Explain why there is a difference in the amount of oxygen taken in at rest and during the vigorous activity. (3) 3.4 Explain how the body is able to increase its oxygen intake during exercise. (2) Volume of air taken in (dm)
Transcribed Image Text:3. The graph below illustrate the intake of air by an athlete during rest, then during a period of vigorous activity and then during rest after the vigorous activity. Study it and answer the questions based on it. 40 35 30 25 20 15 10 1 2 3 456 789 10 11 12 15 14 15 16 17 12 19 20 Time (minutes) 3.1 Determine the maximum volume of the air breathed in during the period of rest for each minute? (1) 3.2What is the maximum amount of air taken in during the period of vigorous activity? (1) 3.3Explain why there is a difference in the amount of oxygen taken in at rest and during the vigorous activity. (3) 3.4 Explain how the body is able to increase its oxygen intake during exercise. (2) Volume of air taken in (dm)
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