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:Hormone |
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A hormone is any of a number of chemical substances produced by specialized tissue formations called [endocrine gland]?s. The substances are secreted directly into the bloodstream, other body fluids, or into adjacent tissues. The purpose of hormones is to regulate metabolic activity of some other organs or tissues of the body. |
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Chemical substance that is produced by a specialized tissue formation called an endocrine gland. The substance is secreted directly into blood-stream, other body fluids or into adjacent tissues. The purpose of hormones is to regulate metabolic activity of some other organs or tissues of the body. The rate of production of a given hormone is most commonly regulated by a mechanism called a [negative feedback loop]?. The notion "endocrine" is contrasted with "exocrine" which means a specialized gland with a distinct secretory duct. Examples of exocrine are salivary or sweat glands and of endocrine glands are thyroid and adrenal glands. The most important hormones : |
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The rate of production of a given hormone is most commonly regulated by a mechanism called a [negative feedback]? loop. The notion "endocrine" is contrasted with "exocrine", which means a specialized gland with a distinct secretory duct. Examples of exocrine glands are salivary or sweat glands; examples of endocrine glands are thyroid and adrenal glands. The most important hormones in humans include: |
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Some special group of hormones are trophic hormones that act as stimulants of hormone production of other endocrine glands. For example thyroid stimulating hormone (TSH) causes growth and increased activity of another endocrine gland - thyroid, hence increasing output of thyroid hormones. |
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One special group of hormones are [trophic hormone]?s that act as stimulants of hormone production of other endocrine glands. For example thyroid stimulating hormone (TSH) causes growth and increased activity of another endocrine gland--the thyroid--hence increasing output of thyroid hormones. |
The rate of production of a given hormone is most commonly regulated by a mechanism called a [negative feedback]? loop.
The notion "endocrine" is contrasted with "exocrine", which means a specialized gland with a distinct secretory duct. Examples of exocrine glands are salivary or sweat glands; examples of endocrine glands are thyroid and adrenal glands.
The most important hormones in humans include:
One special group of hormones are [trophic hormone]?s that act as stimulants of hormone production of other endocrine glands. For example thyroid stimulating hormone (TSH) causes growth and increased activity of another endocrine gland--the thyroid--hence increasing output of thyroid hormones.
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