We can confirm that saliva is in fact a buffer in the body, however, this is due to its concentration of bicarbonate, making C the correct answer.
Why is bicarbonate the primary example of buffers in the body?
The saliva in the human mouth acts as a buffer to protect teeth and other parts of the digestive tract against acids. This buffering functionality is produced by the saliva through the activity of bicarbonate ions.
Therefore, we can confirm that saliva is in fact a buffer in the body, however, this is due to its concentration of bicarbonate, making C the correct answer.
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