If a portion of the pancreas is surgically removed from a rat and the rat subsequently loses its appetite, one explanation is that the removed portion contains cells that secrete a chemical signal that somehow stimulates appetite. given this scenario, what type of chemical signaling is occurring? a. autocrine b. paracrine c. endocrine d. neuroendocrine

The correct option is C.

Explanation:

The endocrine system is a type of  chemical messenger system that is made up of hormones, the glands that secrete the hormones and the feedback loop that regulate the hormone. In an endocrine system, the hormone is secreted directly into the blood stream from where it regulates the functions of distant target organ. Insulin, which is an hormone secreted by the pancreas is a good example of an endocrine hormone.