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Related Concept Videos

Functions of Thyroid Hormones01:18

Functions of Thyroid Hormones

5.6K
The thyroid hormone (TH) plays a pivotal role in the intricate orchestration of physiological processes, exerting profound effects on development, metabolism, and homeostasis throughout different life stages.
TH is indispensable for the normal development and maturation of the skeletal, muscular, and nervous systems during fetal and childhood growth. It facilitates bone mineral turnover and regulates protein synthesis in developing tissues, contributing significantly to overall growth and...
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Synthesis and Regulation of Thyroid Hormones01:20

Synthesis and Regulation of Thyroid Hormones

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Low blood levels of the thyroid hormones — triiodothyronine (T3) and thyroxine (T4) — signal the hypothalamus to release the thyrotropin-releasing hormone (TRH). TRH then reaches the pituitary gland and stimulates the release of thyroid-stimulating hormone(TSH) into the bloodstream.
Upon reaching the thyroid gland, TSH stimulates the follicular cells' active uptake of iodide ions from the blood. The ions diffuse to the apical surface of the cells and are oxidized to iodine. The...
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Types of Hormones02:13

Types of Hormones

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Hormones can be classified into three main types based on their chemical structures: steroids, peptides, and amines. Their actions are mediated by the specific receptors they bind to on target cells.
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Types of Hormones01:21

Types of Hormones

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Hormones are classified into four main groups: steroids, eicosanoids, amino acid-based derivatives, and peptide hormones.
Steroids and eicosanoids fall under the category of lipid-soluble hormones. Steroids are derived from cholesterol and feature four interconnected carbon rings with variable side chains. Notable examples include estradiol from ovaries and testosterone from testes, exemplifying the critical roles of these lipid-soluble hormones in reproductive physiology. Eicosanoids, derived...
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Hormonal Regulation01:33

Hormonal Regulation

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The renin-aldosterone system is an endocrine system which guides the renal absorption of water and electrolytes, thus managing blood pressure and osmoregulation. Activation of the system begins in the kidneys with a small cluster of cells adjacent to the afferent and efferent blood vessels of the renal corpuscle. As the nephrons are filtering blood, juxtaglomerular cells monitor blood pressure. If they detect a decrease in pressure, they release the hormone renin into the bloodstream.
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Hormonal Regulation01:40

Hormonal Regulation

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Hormones regulate a significant portion of digestion through activation of the neuroendocrine system. The neuroendocrine system of digestion contains many different hormones all with multiple functions that are both, directly and indirectly, involved in digestion.
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Related Experiment Video

Updated: Jan 29, 2026

Author Spotlight: Accurately Assessing Thyroid Hormone-Driven Motor Alterations in Mouse
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Thyroid Hormone Suppression Therapy.

Bernadette Biondi1, David S Cooper2

  • 1Department of Clinical Medicine and Surgery, University of Naples Federico II, Via Pansini 5, Naples 80131, Italy.

Endocrinology and Metabolism Clinics of North America
|February 6, 2019
PubMed
Summary
This summary is machine-generated.

Thyroid hormone suppression therapy aims to lower thyrotropin (TSH) levels. However, studies show limited benefits except in advanced thyroid cancer, with risks like osteoporosis and cardiovascular disease.

Keywords:
BoneCardiovascular systemLevothyroxineMortalityThyroid cancerThyrotropin

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Area of Science:

  • Endocrinology
  • Oncology

Background:

  • Thyroid hormone suppression therapy lowers serum thyrotropin (TSH) levels.
  • TSH is a known growth factor for thyroid cancer.
  • Lower TSH may decrease thyroid cancer activity.

Purpose of the Study:

  • To evaluate the efficacy and risks of thyroid hormone suppression therapy for thyroid cancer.

Main Methods:

  • Review of clinical studies on TSH suppression therapy.
  • Analysis of outcomes in relation to disease advancement.
  • Assessment of adverse effects associated with aggressive hormone therapy.

Main Results:

  • Improved outcomes with TSH suppression are documented only in patients with advanced thyroid cancer.
  • Aggressive thyroid hormone therapy is linked to negative outcomes such as osteoporosis, fractures, and cardiovascular disease.

Conclusions:

  • A graded approach to TSH suppression is recommended.
  • Recommendations are based on initial and ongoing risk assessment.
  • The American Thyroid Association guides this approach for thyroid cancer management.