Name: 1
Exercise 10: Acid-Base Balance: Activity 2: Rebreathing Lab Report
Pre-lab Quiz Results
You scored 100% by answering 4 out of 4 questions correctly.
1. In cases of acidosis, the pH of the blood is
You correctly answered: c. less than 7.35.
2. Carbon dioxide and water form
You correctly answered: a. carbonic acid (a weak acid).
3. Which of the following is true of respiratory acidosis?
You correctly answered: c. The amount of carbon dioxide in the blood is greater than normal.
4. Rebreathing
You correctly answered: b. is exemplified by breathing into a paper bag.

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Experiment Results
Predict Question:
Predict Question: What do you think will happen to the pH and PCO2 levels during rebreathing?
Your answer : d. pH and PCO2 will increase.
Stop & Think Questions:
Which of the following can cause respiratory acidosis?
You correctly answered: c. airway obstruction
Experiment Data:
Condition
Normal
Rebreathing

Min PCO2
40
40

Max PCO2
40
54.88

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Min pH
7.39
7.22

Max pH
7.39
7.42

Post-lab Quiz Results
You scored 100% by answering 4 out of 4 questions correctly.
1. Rebreathing simulates
You correctly answered: a. hypoventilation and respiratory acidosis.
2. Hypoventilation results in
You correctly answered: c. an accumulation of carbon dioxide in the blood.
3. The renal system can compensate for respiratory acidosis by
You correctly answered: b. excreting H+ and retaining bicarbonate ion.
4. Respiratory acidosis can be caused by all of the following except
You correctly answered: d. an anxiety attack.

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Review Sheet Results
1. Describe what happened to the pH and the carbon dioxide levels during rebreathing. How well did the results compare with your prediction?
Your answer:
Both were affected bt rebreathing and went up. The results were exactly