define hormones and their special features
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this is the hormones in human body. hormone means a regulatory substance produced in an organism and transported in tissue fluid such as blood or sap to stimulate specific cell or tissue into action
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Hormones are organic chemical substances released by a cell, or organ or a gland or any body part of plants and animals that functions in the regulation of physiological activities and to maintain homeostasis.
Their special features are:-
Hormones are secreted by endocrine cells.
Hormones are chemical messengers.
The are chemical signals that circulate in the body fluids.
The hormones regulate the behavior of the target cells.
Hormones, unlike enzymes do not catalyze any reaction.
They are secreted only when needed, they are not stored prior to requirement.
Hormones may be proteinaceous or non-proteinaceous in nature (amino-acids or steroids).
The secretion of hormones is regulated by the nervous system through the feed back effect.
Hormones usually cause long term effects like change in behavior, growth, etc.
The hormones function is to stimulate or inhibit the target organs.
Their special features are:-
Hormones are secreted by endocrine cells.
Hormones are chemical messengers.
The are chemical signals that circulate in the body fluids.
The hormones regulate the behavior of the target cells.
Hormones, unlike enzymes do not catalyze any reaction.
They are secreted only when needed, they are not stored prior to requirement.
Hormones may be proteinaceous or non-proteinaceous in nature (amino-acids or steroids).
The secretion of hormones is regulated by the nervous system through the feed back effect.
Hormones usually cause long term effects like change in behavior, growth, etc.
The hormones function is to stimulate or inhibit the target organs.
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