Physio Ex 10

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.

04/23/13

page 1

Experiment Results Predict Question: Predict Question: What do you think will happen to the pH and PCO2 levels with hyperventilation? Your answer : d. pH and PCO2 will increase. 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 Normal Hyperventilation Hyperventilation / Normal Min PCO2 40 24.38 30.62 Max PCO2 40 40 40 Min pH 7.41 7.38 7.38 Max pH 7.41 7.6 7.53

04/23/13

page 2

04/23/13

page 3

Post-lab Quiz Results You scored 75% by answering 3 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 Your answer: d. elevated carbon dioxide in the blood. Correct answer: 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.

04/23/13

page 4

Review Sheet Results 1. Describe the normal ranges for pH and carbon dioxide in the blood. Your answer: THE NORMAL RANGE FOR pH IN THE BLOOD IS 7.35 TO 7.45 AND THE NORMAL RANGE FOR CO2 IN THE BLOOD IS 35 TO 45 mmHg. 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: THE pH INCREASED AND THE CO2 LEVEL DECREASED. 3. Explain how returning to normal breathing after hyperventilation differed from hyperventilation without returning to normal breathing. Your answer: DIFFERED BECAUSE NORMAL BREATHING AFTER HYPERVENTILATION INCREASED CO2 LEVEL BUT DECREASED pH. WHEREAS ONLY NORMAL BREATHING INCREASED THE pH AND DECREASED THE CO2 LEVEL. 4. Describe some possible causes of respiratory alkalosis. Your answer: POSSIBLE CAUSES OF RESPIRATORY ALKILOSIS INCLUDE TRAVELING TO HIGH ALTITUDES (WHERE THE AIR CONTAINS LESS O2) OR HYPERVENTILATION BROUGHT ON BY FEVER, PANIC ATTACK OR ANXIETY.

04/23/13

page 5