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PhysioEx 9.0 Exercise 10 Acid/Base Answers for Activity 1-4
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PhysioEx 9.0 Exerciese 10- Activity 1 - Hyperventilation

1. Which of the following is NOT one of the body's physiological chemical buffering systems?
Hydrochloride

2. Which of the following has the greatest capacity for pH change in the body?
Renal System

3. Respiratory alkalosis is a result of
Too little carbon dioxide in the blood

4. Hyperventilation is defines as
An increase in the rate and depth of breathing

5. What is the normal range for the partial pressure of carbon dioxide in the blood?
35- 45 mmHg

6. Hyperventilation can result in
Too little carbon dioxide in the blood

7. Respiratory alkalosis is characterized by a blood pH
Greater than 7.45

8. Why was the breath held after the second hyperventilation?
To retain carbon dioxide

Activity 2 - Rebreathing

1.The formation of carbonic acid from water and carbon dioxide is catalyzed by
Carbonic Anhydrase

2.Too much carbon dioxide in the blood can be the result of
Emphysema

3.Why does rebreathing simulate hypoventilation?
Carbon dioxide accumulates in the blood with either


4.Respiratory acidosis is a result of
An increase in the H+ in the blood

5.Respiratory acidosis can be a result of
Asthma

6.Which of the following occurred during rebreathing?
Carbon dioxide increased

7.Respiratory acidosis can be compensated for by
The kidneys

8.Carbon dioxide levels in the blood and blood pH are
Inversely proportional to each other

Activity 3- Renal Responses to Respiratory Acidosis& Alkalosis

1.How do the kidneys compensate for acid-base imbalances?
All of the above

2.Which of the following have the same effect on plasma pH?
Reabsorption of bicarbonate and excretion of H+

3.The movement of fluid and solutes from the peritubular capillary to the renal tubule is referred to as 
Tubular secretion

4.The nephron is responsible for maintaining
All of the above

5.The kidneys compensate for respiratory alkalosis by
Conserving H+ and excreting bicarbonate ion

6.In uncompensated respiratory acidosis, the
Carbon dioxide levels of the blood are elevated

7.When the partial pressure of carbon dioxide was decreased, what changes occurred in the urine?
H+ in the urine decreased and bicarbonate ion increased in the urine

8.At which partial pressure of carbon dioxide did respiratory acidosis occur?
60 mmHg

Activity 4- Respiratory Responses to Metabolic Acidosis & Metabolic Alkalosis

1.Excessive diarrhea results in which of the following?
Loss of bicarbonate, metabolic acidosis

2.Ingestion of too much alcohol results in which of the following?
Gain of acid, metabolic acidosis

3.Which of the following does NOT result in metabolic alkalosis?
Hyperventilation

4.Ketoacidosis is usually a result of
Uncontrolled diabetes mellitus

5.Compensation of metabolic alkalosis includes which of the following?
excreting bicarbonate ion in the renal system and retaining carbon dioxide through the respiratory system

6.Metabolic acidosis results in
Hyperventilation

7.Which metabolic rate resulted in metabolic acidosis?
80 kcal/hr

8.Which of the following occurred when the metabolic rate was set to 20 kcal/hr?
Metabolic alkalosis and hypoventilation

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