Define Harmones and tell about them in detail.
Dear student.
A hormone is a chemical messenger that regulates physiological processes in living organisms. It is secreted by a gland.
Characteristics of hormones:
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Hormones act as chemical messengers.
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They are secreted by living cells/tissues or organs called glands.
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They are secreted in very small quantities by glands.
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They act upon specific cells, tissues, or organs called the target sites.
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They are generally slow in action but have long-lasting effects.
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They either accelerate or inhibit a reaction.