In the pancreas,base is secreted into the GI lumen and acid is secreted into the blood.This is the reverse of what happens in the stomach.

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The pancreas secretes bicarbonate (a base) into the GI lumen to neutralize the acidic contents from the stomach, while secreting acid into the blood to maintain physiological pH balance. This is the opposite of what happens in the stomach, where acid is secreted into the lumen and base is not secreted.

In the Pancreas,base Is Secreted into the GI Lumen and Acid