Which of the following statements are true? A. In lung capillaries CO2 combines with water to give carbonic acid B. In tissue capillaries, carbonic acid breaks down to CO2 to water C. In lung capillaries, the carbonic acid breaks down to CO2 and H2O D. It tissue capillaries, the carbonic acid combines with hydrogen ions to form the bicarbonate ions
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Step 1: In tissue capillaries, carbon dioxide is produced by the cells and transported as bicarbonate ions in the plasma to the lungs. Show more…
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Which of these is a true statement? a. In lung capillaries, carbon dioxide combines with water to produce carbonic acid. b. In tissue capillaries, carbonic acid breaks down to carbon dioxide and water. c. In lung capillaries, carbonic acid breaks down to carbon dioxide and water. d. In tissue capillaries, carbonic acid combines with hydrogen ions to form the carbonate ion. e. All of these statements are true.
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Which of the following is INCORRECT concerning the O2 / CO2 movement and processing through the lungs and tissues? Select one: a. Binding of O2 to Hb changes its configuration so that CO2 and H+ ions are more likely to dissociate. b. When CO2 diffused into the alveoli, the PaCO2 is lowered. c. Carbonic acid is an intermediate in the reaction combining H+ with HCO3- to form H2O and CO2. d. Arterial blood flows to the tissues where H+ ions combine with HCO3- to form H2O & CO2. e. All of the above
Carbon dioxide is carried in the plasma a. in combination with hemoglobin. b. as the bicarbonate ion. c. combined with carbonic anhydrase. d. only as a part of interstitial fluid. e. All of these are correct.
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