_________ is a hormone, whereas ________________ is an enzyme.

_________ is a hormone, whereas ________________ is an enzyme. 



A. Enterokinase; pepsin
B. Serotonin; somatostatin
C. Gastrin; cholecystokinin (CCK)
D. Histamine; gastric inhibitory peptide (GIP)
E. Secretin; pepsin



Answer: E. Secretin; pepsin


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