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ShareThe thyroid hormones, thyroxine (T4) and triiodothyronine (T3), are tyrosine-based hormones produced by the thyroid gland.
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An important component in the synthesis is iodine.
The thyronines act on the body to increase the basal metabolic rate, affect protein synthesis and increase the body's sensitivity to catecholamines (such as adrenaline) by permissiveness.
The thyroid hormones are essential to proper development and differentiation of all cells of the human body.
These hormones also regulate protein, fat, and carbohydrate metabolism, affecting how human cells use energetic compounds.
Numerous physiological and pathological stimuli influence thyroid hormone synthesis.
The thyronamines function via some unknown mechanism to inhibit neuronal activity; this plays an important role in the hibernation cycles of mammals.
One effect of administering the thyronamines is a severe drop in body temperature.
For more information about the topic Thyroid hormone, read the full article at Wikipedia.org, or see the following related articles:
Endocrine system — The endocrine system is a control system of ductless glands that secrete chemical messengers called hormones that circulate within the body via the ... > read more
Thyroid — The thyroid is one of the larger endocrine glands in the body. It is a double-lobed structure located in the neck and produces hormones, principally ... > read more
Pituitary gland — The pituitary gland, or hypophysis, is an endocrine gland about the size of a pea that sits in the small, bony cavity at the base of the brain. The ... > read more
Anterior pituitary — The anterior pituitary (also called the adenohypophysis) comprises the anterior lobe of the pituitary gland and is part of the endocrine system. ... > read more
Endocrinology — Endocrinology is a branch of medicine dealing with disorders of the endocrine system and its specific secretions called hormones. Hormones are ... > read moreEditor's Note: This article is not intended to provide medical advice, diagnosis or treatment.
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