Final answer:
Hormones are chemical messengers that interact with cell receptors to initiate specific cellular processes. An intracellular mediator is the chemical produced in a cell in response to hormone interaction with a membrane.
Explanation:
Hormones are chemical messengers produced by endocrine glands that travel in the blood to target cells to initiate specific reactions or cellular processes. When a hormone interacts with a receptor on a cell, it can activate specific processes in response. The chemical produced in a cell that activates these processes in response to a hormone interaction with a membrane is referred to as an intracellular mediator.
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