Lab Report on Respiratory Physiology

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Lab Report 6: Respiratory Physiology
Purpose: To describe the effects of carbon dioxide concentration on blood pH. Hypothesis: If the blood CO2 levels increase, the pH will decrease. Materials and Procedures:
Materials: Willing subject (someone complete the activities of the experiment) Timer (with a second hand)
Glass
Urinary and Salivary pH (litmus) paper
Drinking straw
Procedures: 1. Measure 2 ounces of water in a glass. Obtain the pH of the water in the glass. Record the water pH prior to experiment. 2. Have the subject blow air through the straw into the water and keep blowing into the water for 2 minutes inhaling between exhalations. The subject should be breath as normal as possible while doing this activity. Measure and record the pH of the water in the glass. 3. Empty the water from the glass and refill it with fresh water. Have the subject do vigorous exercise for 5 minutes. 4. Immediately after exercise have the subject blow into the water for 2 minutes (inhaling between exhalations). Measure and record the pH of the water in the glass. 5. Empty the water from the glass and refill it with fresh water. Have the subject rest for 5 minutes. 6. Have the subject blow in the water for 2 minutes (inhaling between exhalations). Measure and record the pH of the water in the glass. Analysis and Data: 1. The pH of the water measured is close to a 7 on the pH scale.

2. After the subject blew air into the straw, the pH of the water was about 5 on the pH scale at first, but then turned neutral again.
3. The subject did vigorous exercise for 5 minutes.
4. The pH of the water after the subject was exercising was about 6-7.
5. After refilling a new glass of water, the pH of the fresh water was about 6. Conclusion: The hypothesis...
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