An example of an internal chemical transmitter is a(n) organhormonegland.

Hormone

Explanation:

Hormones are chemical messengers that are secreted by the endocrine glands. They get transported in blood from their source of origin and reach the distant target cells and organs. Hormones bind the receptors on the cells of the target organs and relays the message through cellular signaling into the cells. Hormones are secreted in minute amounts and regulate various physiological functions.

the dissolution of polymer can be thermodynamically described in 2 steps.