Which is not produced enteroendocrinally: (A) Intrinsic factor, (B) Secretin, (C) Motilin, (D) GIP
Answer is A. Enteroendocrinal cells are the hormone secreting cells present in the glands or mucosa of the GIT particularly stomach & intestine. The enteroendocrinal cells present in gastric glands are

G cells- secrete gastrin
Enterochromaffin (EC) cells- secrete serotonin
Enterochromaffin like (ECL) cells- secrete histamine