Which of the following is produced by Argentaffi- noma of ileum?: (A) G.A.B.A., (B) Serotonin, (C) Epinephrine, (D) Nor-epinephrine
Answer is B. Ans. 'b' i.e. Serotonin o Argentaffin cells of the carcinoid produce serotonin.o The metabolites of serotonin are 5HIAA and are used in the diagnosis of carcinoid syndrome.