6/4/2020 Exercise 10: Acid-Base Balance Activity 1: Hyperventilation Name: Date: 4 June 2020 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: the chemical buﬀering system. 2 An increase in hydrogen ion concentration would You correctly answered: decrease pH. 3 The amount of carbon dioxide in the blood is measured in You correctly answered: mm Hg. 4 The reaction of water and carbon dioxide is catalyzed by You correctly answered: carbonic anhydrase. Experiment Results Predict Question 1 Predict Question: What do you think will happen to the pH and P levelsCO with 2 hyperventilation? Your answer: pH and P will CO 2 decrease. Stop & Think Questions 1 Were the pH and P in2 the CO normal range? You correctly answered: Both pH and P were CO2 in the normal range. 2 What was the eﬀect of returning to normal breathing after hyperventilation? You correctly answered: The breathing stopped temporarily to retain carbon dioxide. Experiment Data 1/4 6/4/2020 Condition Min. P CO2 (mm Hg) Normal 40 Hyperventilation Hyperventilation / Normal 19.7 35.3 Max. P CO2 (mm Hg) 40 40 40 Min. pH 7.41 7.40 7.38 Max. pH 7.41 7.69 7.47 Normal Breathing Hyperventilation Hyperventilation then Normal Breathing 2/4 6/4/2020 Post-lab Quiz Results You scored 100% by answering 4 out of 4 questions correctly. 1 Hyperventilation results in You correctly answered: respiratory alkalosis. 2 With hyperventilation, the higher peaks on the tracing indicate You correctly answered: a larger volume of air. 3 Which of the following is not a potential cause of respiratory alkalosis? You correctly answered: emphysema. 4 The kidneys can compensate for respiratory alkalosis by You correctly answered: retaining H and +excreting bicarbonate ion. Review Sheet Results 1 Describe the normal ranges for pH and carbon dioxide in the blood. Your answer: pH: 7.35-7.45 pCO2: 34-45 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: 3/4