Procedures 7 and 8. CO2 production and pH 11. How much time did it take for the

Question

Procedures 7 and 8. CO2 production and pH 11. How much time did it take for the color to change in the resting subject? 12. What does this color change mean? 13. How much time did it take for the color to change in the subject after exercise? 14. Explain any difference in the time for color change to take place between the resting and exercise data. 15. State the hypothesis you developed conceming the effect of exercise on the amount of carbon dioxide in the air exhaled. 16. What conclusions can you draw from the results of this experiment and how does the conclusion affect your hypothesis?

Explanation / Answer

11. During rest condition breathing rate not change, so bromothymol blue solution take longer to change colour.

12. Colour change is due to CO2 react with bromothymol blue it changes to yellow colour.

13. After 60S of continuous exercise lot of CO2 are released from the breathing. So CO2 react with bromothymol blue will increase, so the time required to change the colour will decrease.

14. During excercise time required to change the colour is less compare to resting stage.

15. Hypothesis
After continuous exercise, the heart and breathing rate would increase, and more carbon dioxide would be produced.

During rest heart and breathing rate will remain same, and the bromothymol blue solution will take longer to change colour.

16. Conclusion
cellular respiration takes place in our bodies while resting and during exercise, the respiratory system works to restore oxygenated blood and keep the bodies energy levels able to sustain any stress.

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