Multiple Choice
Animals use O2 and CO2 (pH) levels to regulate ventilation. Which of the following is CORRECT?
A) Water breathers primarily regulate ventilation in response to changes in CO2 because their internal levels of CO2 are very similar to water.
B) Water breathers primarily regulate ventilation in response to changes in CO2 because O2 is readily available from water.
C) Air breathers primarily regulate ventilation in response to changes in CO2 because their internal levels of CO2 are higher than for air.
D) Water breathers primarily regulate ventilation in response to O2 changes as the level of O2 in water is low.
E) Air breathers primarily regulate ventilation in response to changes in O2 because O2 is readily available from air.
Correct Answer:

Verified
Correct Answer:
Verified
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