They are called endocrine glands or organs, and their chemical contributions to the blood are known as hormones.
Examplesofendocrine gland
endocrine gland
These are the ones that act in the end of the chain reaction on other cells that are not part of otherendocrinegland.
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This differs from the tropic hormones, which act on anotherendocrinegland.
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Tropic hormones usually act in the beginning of the reaction stimulating otherendocrineglandto eventually release non-tropic hormones.
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Anendocrineglandis attached to the ventral posterior surface of the brain, and appears to be involved in reproductive activity.
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It is both anendocrineglandand an exocrine gland.
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These neurotransmitters are needed for normal memory, mood, muscle tone and coordination, emotional responses,endocrineglandsecretions, heart rate, and blood pressure control.
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He observed that nervous tissue could behave like anendocrinegland.
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Almost always, this entails operating to remove a tumor which has grown on or within anendocrinegland.
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Non-tropic hormones are those that act directly on targeted tissues or cells, and not on otherendocrineglandto stimulate release of other hormones.
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It is anendocrineglandproducing several important hormones, including insulin, glucagon, somatostatin, and pancreatic polypeptide which circulate in the blood.
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In contrast, "neuroactive steroid" refers to steroids that are synthesized by anendocrineglandthat then reach the brain through the bloodstream and have effects on brain function.
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The enzymatic reactions that produce these steroids can take place in either the endocrine glands or the target tissues on which they act, such as the brain.
From theCambridge English Corpus
They can also have a harmful effect on the endocrine glands, and are reprotoxic and carcinogenic.
FromEuroparl Parallel Corpus - English
L-type calcium channels are responsible for excitation-contraction coupling of skeletal, smooth, and cardiac muscle and for hormone secretion in cells in endocrine glands.
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Hormone formation may arise at localized clusters of specific cells known as endocrine glands, or at other specialized cells with several functions.
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These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors.
This example is from Wikipedia and may be reused under a CC BY-SA license.