Define hormone.

검증된 단계별 안내

Understand that a hormone is a chemical messenger produced by endocrine glands in the body.

Recognize that hormones are secreted directly into the bloodstream, allowing them to travel to target organs or tissues.

Note that hormones regulate various physiological processes such as growth, metabolism, reproduction, and homeostasis.

Identify that hormones can be proteins, peptides, steroids, or amines, depending on their chemical structure.

Summarize the definition: a hormone is a signaling molecule released by endocrine cells that influences the function of distant target cells.

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주요 개념

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Hormone Definition

Hormones are chemical messengers produced by endocrine glands that regulate various physiological processes by traveling through the bloodstream to target organs or cells. They influence growth, metabolism, reproduction, and homeostasis.

Endocrine System

The endocrine system consists of glands that secrete hormones directly into the blood. It works alongside the nervous system to maintain body functions and respond to internal and external stimuli.

Target Cells and Receptors

Hormones affect only specific target cells that have receptors matching the hormone's shape. This receptor-hormone interaction triggers a response within the cell, enabling precise regulation of bodily functions.