Final answer:
Hormones are chemicals that are secreted and go directly into the bloodstream. They travel through the body and bind to receptors on target cells to elicit a response.
Step-by-step explanation:
Hormones are chemicals that are secreted and go directly into the bloodstream. They are released by endocrine glands, which make up the endocrine system. Hormones travel through the bloodstream and bind to receptors on target cells to elicit a response.