[PhysioEX Chapter 10 exercise 1] PEX-10-01

Solved by ramonistry

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.

1. The fastest compensatory mechanism for maintaining pH homeostasis in the human body is
   You correctly answered: c. the chemical buffering system.

2. An increase in hydrogen ion concentration would
   You correctly answered: d. decrease pH.

3. The amount of carbon dioxide in the blood is measured in
   You correctly answered: b. mm Hg.

4. The reaction of water and carbon dioxide is catalyzed by
   You correctly answered: a. carbonic anhydrase.

Experiment Results
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.

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.

What was the effect of returning to normal breathing after hyperventilation?
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

Post-lab Quiz Results
You scored 100% by answering 4 out of 4 questions correctly.

1. Hyperventilation results in
   You correctly answered: b. respiratory alkalosis.

2. With hyperventilation, the higher peaks on the tracing indicate
   You correctly answered: a. a larger volume of air.

3. Which of the following is not a potential cause of respiratory alkalosis?
   You correctly answered: d. emphysema

4. The kidneys can compensate for respiratory alkalosis by
   You correctly answered: b. retaining H+ and excreting bicarbonate ion.

Review Sheet Results

1. 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

2. 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.

3. 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.

4. Describe some possible causes of respiratory alkalosis.
   Your answer:
   Inceasing of respiration, for example by stimulation of respiratory center followed by diseases.