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Ch. 22 Continued

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nessaram994's version from 2017-10-22 16:50

Section 1

Question Answer
Two gases contribute to the majority of total atmospheric pressure. They are ______. a. CO2 and O2 b. N2 and O2 c. CO2 and H2O vapor d. N2 and CO2b. N2 and O2
How is most oxygen carried in the blood?Bound to Hemoglobin
Hemoglobin molecules are fully saturated when bound to ______ molecule(s) of O2. a. one b. two c. three d. fourd. four
1. Which mechanism allows exchange of oxygen and carbon dioxide in the lungs and through cell membranes?Diffusion
1. The rate of oxygen diffusion across the respiratory membrane depends upon all of the following except ______. a. the thickness of the respiratory membrane b. partial pressure of oxygen in the alveoli c. partial pressure of oxygen in the blood d. partial pressure of carbon dioxide in the blood d. partial pressure of carbon dioxide in the blood
1. Low PO2 and high PCO2 in the alveoli will cause ________. a. constriction of pulmonary capillaries and bronchioles b. dilation of pulmonary capillaries and bronchioles c. constriction of pulmonary capillaries and dilation of bronchioles d. dilation of pulmonary capillaries and constriction of bronchiolesc. constriction of pulmonary capillaries and dilation of bronchioles
1. Where alveolar CO2 is high, bronchioles ______, CO2 is low, bronchioles ________. a. Dilate; constrict b. Dilate; stay the same diameter c. Constrict; dilate d. Constrict; stay the same diametera. Dilate; constrict
1. What is the purpose of the “chloride shift” in red blood cells? a. To provide chlorine to the enzyme carbonic anhydrase b. To counterbalance the exodus of bicarbonate ions from red blood cells c. To counterbalance the exodus of H+ from red blood cells d. To convert chloride ions to bicarbonate ions b. To counterbalance the exodus of bicarbonate ions from red blood cells
1. Which of the following has the highest affinity for O2? a. Hb with no O2 bound b. Hb with one O2 bound c. Hb with two O2 bound d. Hb with three O2 boundd. Hb with three O2 bound
1. Of the following, ______ has the highest affinity for hemoglobin. a. O2 b. CO2 c. CO d. H+c. CO
1. Which of the following will make hemoglobin's affinity for oxygen increase? a. A decrease in pH b. An decrease in PCO2 c. An increase in temperatureb. An decrease in PCO2
1. In the blood, most carbon dioxide is transported _______. a. bound to hemoglobin b. dissolved in the plasma c. as bicarbonate ions as carbonic acid d. as carbonic acidc. as bicarbonate ions as carbonic acid
1. Increases in temperature, H+, CO2, or BPG will cause the affinity of Hb for O2 to _______. a. Increase b. Stay the same c. Decreasec. Decrease
1. What causes hypoxia? a. Inadequate O2 delivery to tissues b. Carbon monoxide poisoning c. Impaired ventilation d. All of the aboved. All of the above
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Section 2

Question Answer
1. Loss of lung elasticity and destruction of alveolar walls is termed _______. a. asthma b. emphysema c. chronic bronchitis d. dyspneab. emphysema
1. A decrease in pH will have what effect on the respiration rate? a. Decrease b. Increase c. No effect d. No effect unless lung damage is presentb. Increase
1. Hyperventilation can be treated by: a. Exhaling forcefully b. Increasing breathing rate c. Inhaling air rich in O2 d. Inhaling air rich in CO2 d. Inhaling air rich in CO2
1. ________ is the most potent chemical influencing respiration. a. O2 b. N c. H2O d. CO2d. CO2
1. True or false: You can voluntarily suffocate yourself by holding your breath.False
1. A history of _______ is seen in the majority of patients with chronic obstructive pulmonary disease a. Swimming b. Vegan diet c. Drinking d. Smokingd. Smoking
1. Hypoventilation is associated with respiratory _________. a. Alkalosis b. Acidosisb. Acidosis
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