eliana’s doctor told her that she was suffering from celiac disease, and that her body was reacting to gluten in the food she was consuming. another result of her blood tests was that she had elevated antibodies that were a consequence of an immune response to the gluten. if eliana eliminated gluten from her diet, he explained that her symptoms would dissipate and the damage to her intestine wall should gradually return to normal. what is true of the mucosa of a healthy small intestine?