A human's blood buffering system would need to take up H+( hydrogen ions) as the coffee was digested to lower the level of acid present in the blood stream.
Buffering system is defined as the system that helps to maintain the pH of a system when acid or base is added to it.
The blood has the ability to stabilise its pH when acidic or basic food substances are ingested.
Therefore after drinking a great deal of Cola (pH 3.5), the blood buffering system would need to take up H+( hydrogen ions) as the coffee was digested to lower the level of acid present in the blood stream.
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