Which of the following is produced by Carcinoid tumor?: (A) G.A.B.A, (B) Serotonin, (C) Epinephrine, (D) Nor-epinephrine
Answer is B. Ans. (b) SerotoninRef : Harrison 19th ed. / 564-65* Argentaffin cells in Carcinoid produce 5HT derivatives like serotonin. Epinephrine and norepinephrine are produced by chromaffin cells which are seen in phaeochromocytoma.