z Test 2 instructure.com/ 27894/quizzes/9798/take/questions/158954 5 p D Questio

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z Test 2 instructure.com/ 27894/quizzes/9798/take/questions/158954 5 p D Question 16 In the following figure, what is the message about the role of CO2 in oxygen transport in comparison to pH changes in tissues? (Figure 9.16 in your textbook) 90 80 70 50 40Shit to right 30 20- (2) Increased CO Increased temperature 10 4) Increased BPG 0 10 20 30 40 50 60 70 80 90 100 110 120 130140 Pressure n O At ph 7.2 transport (40 torr CO2) oxygen is not being transported by hemoglobin Neither of the answers is correct As CO2 increases hemoglobin becomes more efficient at delivering oxygen to the tissues Oxygen transport by hemoglobin decreases as CO2 increases and the pi decreases Next Previous Quiz saved at 9:25am

Explanation / Answer

As the carbon-dioxide level is increased in the blood, more amount of hydrogen ions are produced and this decreases the pH. Due to the increased carbon-dioxide level and the subsequent decrease in pH, the affinity of hemoglobin for oxygen is reduced. With the result oxygen gets dissociated from hemoglobin and the oxygen dissociation curve shifts to the right. Therefore, oxygen transport by hemoglobin decreases as carbon-dioxide increases and the pH decreases. So, the correct option is option D.

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