Final answer:
Hormones are chemical messengers secreted by endocrine glands into the bloodstream, responsible for regulating a wide range of physiological processes and maintaining homeostasis in the body.
Step-by-step explanation:
Hormones are chemical messengers that are integral to maintaining homeostasis within the body. These endocrine hormones are secreted by glands into the bloodstream and are pivotal in regulating the activity of various cells and organs. The process involves hormones being released into body fluids, such as blood, which then transport these signaling molecules to their target cells, where they bind to specific receptors and elicit a biological response.
These endocrine glands form part of the endocrine system and include structures like the pancreas, adrenal glands, and thyroid gland. For instance, the pancreas produces insulin and glucagon to control blood glucose levels, while the adrenal glands release hormones such as epinephrine and norepinephrine, which help regulate the body's stress response. The thyroid gland's production of thyroid hormones influences metabolic rates. Thus, the endocrine system plays a crucial role in regulating numerous physiological processes including growth, development, metabolism, and reproduction through the action of hormones.