What is happening to the pH of the lungs due to exhalation?
CO2 increases from exhalation, thus the pH of the lungs increases.
CO2 increases from exhalation, thus the pH of the lungs decreases.
CO decreases from exhalation, thus the pH of the lungs
decreases.
2
CO2 decreases from exhalation, thus the pH of the lungs increases.
Hemoglobin acts as a buffer to prevent blood from becoming too acidic by
binding ___.
Correct! The CO2 in the lung decreases as we exhale and the H+ that
was on hemoglobin is recombined with the bicarbonate ion which
produces CO2 and H2O. The acidic H+ is now part of water, which is
neutral, thus increasing the pH.
excess oxygen
excess CO2
excess H+
excess bicarbonate
What property of hemoglobin, not observed in myoglobin, enables hemoglobin
to be an effective oxygen delivery molecule?
Bent shape
Parabolic curve
Cooperativity
High iron content
Which feature of hemoglobin makes it an effective oxygen transport molecule?
Correct! H+ causes blood pH to drop and become acidic. Hemoglobin
binds to H+ which not only causes O2 to be released to the tissues
but also buffers the blood to allow the pH to increase.
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