Res 140 ex 1
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| show | D) Increased temperature
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| show | C) Increases the availability of oxygen to the tissues.
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| Which of the following would you expect to find with “oxygen debt”? | show 🗑
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| Regarding pulmonary blood flow in the upright lung, which of the following statements is true? | show 🗑
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| The time available for diffusion in the lung is mainly a function of which of the following? | show 🗑
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| A 70-kg male patient has a VCO2 of 200 ml/min and a VA of 9 L/min. From this information, what can you infer? | show 🗑
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| show | A) A level of 60 mm Hg marks the beginning of the steep part of O2Hb dissociation curve.
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| show | C) Cells
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| show | A) 0.12 ml/dl
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| What does V/Q mismatch have the biggest impact on? | show 🗑
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| A patient has a P50 value of 29 mm Hg. What does this indicate? | show 🗑
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| show | D) I, II, and III I. Blood exiting the pulmonary capillary will have a PO2 = 40 and a PCO2 = 46. II. The area represents an alveolar shunt. III. The V/Q is 0.
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| show | B) Difference in partial pressures (pressure gradient)
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| show | B) 75 mm Hg
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| show | A) 5 ml/dl
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| When Hb saturation with oxygen is high, less carbon dioxide is carried in the blood. What is this relationship called? | show 🗑
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| show | A) Its partial pressure
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| Which of the following best represents the partial pressures of all gases in the normally ventilated and perfused alveolus when breathing room air at sea level? | show 🗑
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| Which of the following “layers” must be traversed by gases moving across the alveolar-capillary membrane? | show 🗑
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| In a person breathing room air (and with all else being normal), if the alveolar PCO2 rises from 40 to 70 mm Hg, what would you expect? | show 🗑
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| Which of the following values corresponds most closely to the normal PO2 and PCO2 in the mixed venous blood returning to the lungs from the right side of the heart? | show 🗑
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| show | B) Banked blood
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| show | A) Decrease in the CaO2 - CvO2
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| The oxidation of the Hb molecule’s iron ions to the ferric state (Fe3+) results in which of the following? | show 🗑
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| Carbon dioxide is most commonly elevated due to significant pulmonary disease that results in small tidal volumes. | show 🗑
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| show | C) Hb
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| show | A) I and II I. The affinity of Hb for oxygen decreases. II. The Hb saturation for a given PO2 falls.
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| show | D) I, II, and III I. Decrease in arterial PO2. II. Decrease in available Hb. III. Decrease in cardiac output.
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| When a Hb molecule accumulates excessive amounts of HCO3-, it is expelled from the cell in exchange for Cl-. What is this called? | show 🗑
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| If the total hemoglobin content (Hb + HbO2) of a sample of blood is 20 g/dl and the oxyhemoglobin (HbO2) content is 15 g/dl, what is the HbO2 saturation? | show 🗑
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| show | D) I, II, and III I. Chemically combined with proteins II. Ionized as bicarbonate (HCO3-) III. Simple physical solution
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| Under normal physiologic circumstances, how many milliliters of oxygen are capable of combining with 1 g of Hb? | show 🗑
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| A patient has a whole-body oxygen consumption of 320 ml/min and a measured CaO2 - Cv O2 of 8 ml/dl. What is the cardiac output? | show 🗑
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| On what does the movement of gases between the lungs and the body tissues mainly depend? | show 🗑
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| What occurs in the bases of the upright lung? | show 🗑
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| Which of the following equations best describes oxygen delivery to the tissues? | show 🗑
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| show | B) Dysoxia
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| show | B) I and II I. The affinity of Hb for oxygen decreases. II. The Hb saturation for a given PO2 falls.
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| show | C) Enhances oxygen delivery to tissues and oxygen pickup at lungs.
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| show | D) V/Q mismatch
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| show | D) 200 or greater
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| Under what conditions will the alveolar PACO2 rise above normal? | show 🗑
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| show | C) Cells
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| Given the following blood parameters, compute the total oxygen content (dissolved + HbO2) of the blood in ml/dl: Hb = 16; PO2 = 625 Hg; SO2 = 100%. | show 🗑
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| show | C) It delivers more oxygen to tissues at low PaO2 than normal Hb.
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| Which of the following gases would diffuse fastest across the alveolar-capillary membrane? | show 🗑
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| What is the minimum amount of time that blood must take for pulmonary capillary transit for equilibration of oxygen to occur across the alveolar-capillary membrane? | show 🗑
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| Even in healthy young subjects, regional differences in pulmonary ventilation and blood flow result in the PaO2 being lower than the PAO2. Why is this so? | show 🗑
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| show | B) 110 to 120 mm Hg
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| show | B) 17.7 ml/dl
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