Which of the Following is a Hormone

Question

Which of the following is a hormone?
A) HCl
B) Cholecystokinin
C) Trypsin
D) Lipase

Accepted Answer

Cholecystokinin is a hormone that is released by the small intestine in response to the presence of fat and protein in the digestive system. It plays a role in stimulating the release of digestive enzymes and bile from the pancreas and gallbladder, respectively. HCl, trypsin, and lipase are all enzymes involved in digestion, but they are not hormones.