Remember that Exocrine means a gland that is exposed tobthe outside while endocrine is anything located with the body. Adenoid or "tonsils" are an example of Exocrine, salivary gland also being another example. The pancreas and adrenal glands are an example of endocrine.
Maddie should ask her doctor what the terms he/she used (that she didn't understand) mean. Or she can go the sarcastic route and just say "In English please."