APUD cell

APUD cell refers to a type of cell in the mucosa. The name is derived from an acronym, referring to the following:
 * Amine - for high amine content.
 * Precursor Uptake - for high uptake of (amine) precursors.
 * Decarboxylase - for high content of the enzyme amino acid decarboxylase (for conversion of precursors to amines).