Describe how hormones regulate digestion.

The role that some of these hormones play is outlined below: Ghrelin is produced in the stomach, and its function is to tell the brain that the body has to be fed. Gastrin is produced in the stomach when it is stretched. It stimulates the release of gastric juice rich in pepsin and hydrochloric acid.

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enzyme speed up the reactions

after receiving a stimus, the sensory receptors send(s) signals to the appropriate area of the body.  

the must be sensory neurons.  

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