How does respiratory ventilation regulate ph (for example, if the ph went down, what response would occur in breathing, what changes in the blood would occur and how would this affect the ph? )

Ithink the answer is e.

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Agroup of engineering students from purdue university reported that its licking machine, modeled after a human tongue, took an average of 364 licks to get to the center of a tootsie pop. twenty of the group's volunteers assumed the licking challenge-unassisted by machinery-and averaged 252 licks each to the center.