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  1. Hormone - Wikipedia

    Hormones are required for the normal development of animals, plants and fungi. Due to the broad definition of a hormone (as a signaling molecule that exerts its effects far from its site of …

  2. Hormones: What They Are, Function & Types - Cleveland Clinic

    Feb 23, 2022 · Hormones are chemical messengers that coordinate different functions in your body. Several glands, organs and tissues make and release hormones, many of which make …

  3. Hormone | Definition, Function, & Types | Britannica

    Oct 7, 2025 · A hormone is an organic substance secreted by plants and animals that functions in the regulation of physiological activities and in maintaining homeostasis. Hormones carry out …

  4. Hormones and the Endocrine System | Johns Hopkins Medicine

    Consider the following hormones and their role in the workings of the endocrine system: Controls production of sex hormones (estrogen in women and testosterone in men) and the production …

  5. What Is a Hormone? | National Institute of General Medical ...

    Jul 17, 2024 · Hormones are chemical messengers in the body that glands form and release, or secrete, into the bloodstream, where they travel to various organs and tissues to change …

  6. Hormones - Definition, Function, Sources, and Regulation

    Oct 21, 2025 · Download Free Hormone Educational Resources Enhance your understanding of the endocrine system with these free, printable PDF resources! This set includes: A detailed …

  7. Hormones | Endocrine Glands | MedlinePlus

    Jun 28, 2025 · Hormones are your body's chemical messengers. They affect many processes including mood. Too much or too little of a certain hormone can have health implications.

  8. Hormones - Psychology Today

    Hormones are a class of signaling molecules that exist in all multi-cell organisms and, in humans, include commonly-known examples like melatonin, testosterone, and cortisol. They influence …

  9. What are hormones? Types, functions, and imbalances

    Jun 26, 2024 · Hormones are chemical messengers that send a signal to one or more tissues or organs in the body. They are part of the endocrine system, and the study of this system is …

  10. What are Hormones? - News-Medical.net

    Mar 19, 2025 · Beta cells within the pancreas synthesize and secrete insulin, a peptide hormone that regulates various metabolic processes, the most notable of which is controlling glucose …