What are the chemical substances secreted by the endocrine glands that are carried by the bloodstream known as?

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Quizplus · Accepted Answer

Hormones are chemical substances secreted by the endocrine glands and carried by the bloodstream to target cells or tissues, where they exert their physiological effects. They are different from neurotransmitters, which are released by neurons to communicate with other neurons or muscle cells, and gonads, which are organs that produce gametes (sperm and eggs) and sex hormones. Endorphins are a type of hormone that is produced in response to pain and stress to promote feelings of pleasure and reduce pain.

What Are the Chemical Substances Secreted by the Endocrine Glands