Final answer:
A) Oxygen content, pH, glucose levels
The blood at Y differs from X in oxygen content, pH, and glucose levels; arterial blood has more oxygen and often higher glucose than venous blood, which has a lower pH.
Step-by-step explanation:
Three ways in which the blood at Y differs from the blood at X, other than in the concentration of carbon dioxide, could include differences in oxygen content, pH, and glucose levels. The oxygen content is typically higher in arterial blood (blood at X, which leaves the heart and is oxygen-rich) compared to venous blood (blood at Y, which returns to the heart and is oxygen-depleted). The pH level may also differ; blood returning from tissues (at Y) often has a lower pH due to the increased concentration of hydrogen ions (produced when carbon dioxide reacts with water to form carbonic acid). Lastly, the glucose levels could be different as well, since tissues continuously consume glucose for energy, which can lower its concentration in venous blood compared to arterial blood.