RES140 Final REVIEW QUESTIONS AND ANSWERS
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
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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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