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File Edit View History Book People Window Help s Secure Login My d Content-Blac x Not Secure ezto.mheducation.com/hm.tpx 33. 0.25 points Which of the following is true when the water on one side of the semipermeable membrane contains hemoglobin molecules and the water on the other side does not? O The PO2 will eventually equalize after the hemoglobin molecules become saturated with onygen. O The PO2 will be unable to equalize after the hemoglobin molecules become saturated with axygen because of the attraction between oxygen and hemoglobin. O The area on the side of the oxygen-permeable membrane with the hemoglobin maintains a higher PO2 The area on the side of the oxygen-permeable membrane without the hemoglobin maintains a higher PO2 O The PO2 will be unable to equalize after the hemoglobin molecules become saturated with oxygen because of the repulsion between oxygen saturated hemoglob References eBook&Resources Multiple Choice Section: 18.02

Explanation / Answer

Answer: Option A is correct.
Explanation:
Hemoglobin is a carrier molecule for oxygen and CO2 in the blood.
The lipid bilayer is permeable to gas molecules such as O2 and CO2.

When the water on one side of the semipermeable membrane contains hemoglobin molecules and the water on the other side does not contain hemoglobin, the PO2 will eventually equalize after the hemoglobin molecules become saturated with oxygen.

This is because Hb binds to oxygen on one side. Once it gets saturated with oxygen binding, the remaining oxygen is maintained at equilibrium between both the sides of the membrane by simple diffusion through the membrane.

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