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Exercise 10: Acid-Base Balance: Activity 1: Hyperventilation Lab Report
Pre-lab Quiz Results
You scored 100% by answering 4 out of 4 questions correctly.
Pre-lab Quiz Results
You scored 100% by answering 4 out of 4 questions correctly.
- The fastest compensatory mechanism for maintaining pH homeostasis in the human body is
You correctly answered: c. the chemical buffering system. - An increase in hydrogen ion concentration would
You correctly answered: d. decrease pH. - The amount of carbon dioxide in the blood is measured in
You correctly answered: b. mm Hg. - The reaction of water and carbon dioxide is catalyzed by
You correctly answered: a. carbonic anhydrase.
Experiment Results
Predict Question:
Predict Question:
Predict Question: What do you think will happen to the pH and PCO2 levels with hyperventilation?
Your answer : c. pH will increase and PCO2 will decrease.
Your answer : c. pH will increase and PCO2 will decrease.
Stop & Think Questions:
Were the pH and PCO2 in the normal range?
You correctly answered: c. Both pH and PCO2 were in the normal range.
Were the pH and PCO2 in the normal range?
You correctly answered: c. Both pH and PCO2 were in the normal range.
What was the effect of returning to normal breathing after hyperventilation?
You correctly answered: b. The breathing stopped temporarily to retain carbon dioxide.
You correctly answered: b. The breathing stopped temporarily to retain carbon dioxide.
Experiment Data:
Condition Min PCO2 Max PCO2 Min pH Max pH
Normal 40 40 7.42 7.42
Hyperventilation 19.7 40 7.4 7.69
Hyperventilation / Normal 32.18 40 7.38 7.51
Condition Min PCO2 Max PCO2 Min pH Max pH
Normal 40 40 7.42 7.42
Hyperventilation 19.7 40 7.4 7.69
Hyperventilation / Normal 32.18 40 7.38 7.51
Post-lab Quiz Results
You scored 100% by answering 4 out of 4 questions correctly.
You scored 100% by answering 4 out of 4 questions correctly.
- Hyperventilation results in
You correctly answered: b. respiratory alkalosis. - With hyperventilation, the higher peaks on the tracing indicate
You correctly answered: a. a larger volume of air. - Which of the following is not a potential cause of respiratory alkalosis?
You correctly answered: d. emphysema - The kidneys can compensate for respiratory alkalosis by
You correctly answered: b. retaining H+ and excreting bicarbonate ion.
Review Sheet Results
- Describe the normal ranges for pH and carbon dioxide in the blood.
Your answer:
Normal pH is 7.42. Normal pressure of co2 is 40 - Describe what happened to the pH and the carbon dioxide level with hyperventilation. How well did the results compare
with your prediction?
Your answer:
pH increased and P co2 decreased as predicted. - Explain how returning to normal breathing after hyperventilation differed from hyperventilation without returning to
normal breathing.
Your answer:
When there is a return to normal breathing after hyperventilating, there is a brief period of about 10 seconds, where the
breath is held in order to retain some CO2. - Describe some possible causes of respiratory alkalosis.
Your answer:
Inceasing of respiration, for example by stimulation of respiratory center followed by diseases.
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