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RES140 Final REVIEW QUESTIONS AND ANSWERS

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Question
Answer
When the pH is increased [hydrogen ion concentration (H+) is decreased], in which direction will the HbO2 Dissociation Curve shift?   show
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show D. To the right  
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show A. Changes in alveolar ventilation (VA) and pulmonary capillary blood flow (QC)  
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In which direction will the O2 Dissociation Curve shift, due to an increase in body temperature?   show
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show C. Hypoxemia due to physiological shunting  
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The impact of changes in blood pH on hemoglobin’s affinity for oxygen is called the   show
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show B. Tissue O2 delivery is inadequate to meet cellular needs.  
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List the 3 different ways CO2 is transported in the blood to the lungs along with the percentage for each form.   show
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show Maintain a normal blood pH  
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show False  
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show False  
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With respect to the excretion of H+ and reabsorption, how will the kidneys respond if the blood PaCO2 is high?   show
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True or False According to the Henderson-Hasselbalch equation, the pH of the blood will be normal as long as the ratio of HCO3 to dissolved CO2 is 30 to 1 (30:1).   show
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show True  
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show True  
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True or False Compensation for respiratory acidosis occurs through a decrease in blood HCO3 levels.   show
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show True  
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True or False In acute respiratory acidosis, for each 10 mm Hg rise in PCO2 above 40 mmHg the plasma HCO3- can be expected to increase by about 1 mEq/L.   show
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An increase in body temperature will shift the oxygen dissociation curve in what direction?   show
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show False  
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The ______________ alters the position of the HbO2 Dissociation curve.   show
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In healthy young adults, what is considered a normal of PAO2-PaO2 gradient (A-a Gradient)?   show
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Which of the following contains the highest level of PCO2?   show
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All of the following increase the affinity that hemoglobin has for oxygen except:   show
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show C. 19.5 mL/dL  
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show D. 5 mL/dL  
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Which of the following approximate a normal P50?   show
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show A. 97%  
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show A. 90%  
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Where is the lowest PO2 normally found?   show
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show B. Chemically combined with Hb  
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show D. As bicarbonate ion (HCO3)  
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show DO2 = 6 (16 x 10) DO2 = 6(160) DO2 = 960 ml  
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There is a total of 14 g/dL hemoglobin (Hb) in the blood, of which 7.5 g is HbO2. What is the calculated SaO2 (%)?   show
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While receiving an oxygen concentration (FIO2) of 65%, a patient’s PaO2 is 50 mmHg. What is the mostly likely causing this problem?   show
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show C. Metabolic Acidosis  
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Why is the bicarbonate buffer system, considered an open buffer system?   show
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show 20:1  
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show C. The PaCO2 is less than 35 mmHg  
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show III. An increase in buffer base  
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show C. I, and III only  
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An increase in the hydrogen ion concentration [H+] of the blood due only to an increase in the arterial PCO2 (hypercapnea), best describes which acid-base disorder?   show
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Interpret the following set of ABG values: pH = 7.22, PCO2 = 60 mm Hg, HCO3 = 24 mEq/L   show
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show I. The HCO3:CO2 ratio exceeds 30:1. II. The blood pH exceeds 7.45. D. I and II only  
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What is the normal range of PAO2-PaO2 gradient (A-a Gradient) for a healthy young adult breathing room air?   show
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Which equation describes O2 delivery to the tissues?   show
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show Oxygen dissolved in the blood plasma  
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Under what conditions may even the delivery of 100% O2 not be sufficient to achieve a satisfactory arterial oxygen content?   show
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show Anemic hypoxia  
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How is the vast majority of O2 carried in the blood?   show
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True or False: Gas solubility in liquids varies indirectly with pressure.   show
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show False  
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show 40%  
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True or False: Average body cellular fluid has a tonicity equal to a 0.9% solution of NaCl. This is referred to as an isotonic solution.   show
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show gEq = Gram atomic (formula) weight ÷ Valence  
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True or False: 10 grams of solute dissolved 100 ml of solution can be described as weight to volume solution.   show
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show True  
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What maintains the volume and composition of body fluids?   show
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show True  
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show A. Low capillary hydrostatic pressure  
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show False  
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