Acid-Base Balance
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.
Experiment Results
Predict Question: Predict Question: What do you think will happen to the pH and PCO2 levels during rebreathing?
Your answer : b. pH will decrease 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 P
...CO2 40 40 Max PCO2 40 53. 95 Min pH 7. 41 7. 24 Max pH 7. 41 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.
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: My prediction was correct. During rebreathing the PCO2 amount in the blood increased 8. 5 above the normal maximum range. Which cause the body to be
state of acidosis because the pH dropped 0. 11 below the normal minimum range.
2. Describe some possible causes of respiratory acidosis.
Your answer: Respiratory acidosis can occur from airway obstruction, depression of the respiratory center in the brain stem, lung disease, and drug overdose.
3. Explain how the renal system would compensate for respiratory acidosis.
Your answer: The renal system can compensate for respiratory acidosis by excreting H+ and excreting biocarbonate ion in the urine.
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