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Related Concept Videos

Synthesis and Regulation of Thyroid Hormones01:20

Synthesis and Regulation of Thyroid Hormones

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 iodine is then...
Functions of Thyroid Hormones01:18

Functions of Thyroid Hormones

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...
Hyperthyroidism I: Introduction01:25

Hyperthyroidism I: Introduction

Hyperthyroidism is a type of thyrotoxicosis characterized by the thyroid gland's overproduction of the thyroid hormones triiodothyronine (T3) and thyroxine (T4). This hormone excess increases the basal metabolic rate and enhances sensitivity to catecholamines.DiagnosisDiagnosis is based on clinical features and biochemical testing. It typically shows suppressed thyroid-stimulating hormone (TSH) levels below 0.4 mIU/L, with elevated free T3 and/or T4. Additional tests, including thyroid...
Hypothyroidism II: Pathophysiology01:23

Hypothyroidism II: Pathophysiology

Hypothyroidism is a disorder characterized by insufficient production of thyroid hormones, which regulate metabolism, energy balance, and multiple organ systems.TypesHypothyroidism is classified based on the level of dysfunction. Primary hypothyroidism results from intrinsic thyroid gland dysfunction, causing reduced hormone production despite normal or increased stimulation. Secondary hypothyroidism arises from inadequate thyroid-stimulating hormone (TSH) secretion by the pituitary. Tertiary...
Hyperthyroidism II: Pathophysiology01:27

Hyperthyroidism II: Pathophysiology

Hyperthyroidism is a hypermetabolic state caused by elevated levels of thyroid hormones, triiodothyronine (T3) and thyroxine (T4). It results from dysregulation at the thyroid, pituitary, or immune system level and affects multiple organ systems.PathophysiologyThe most common cause of hyperthyroidism is Graves’ disease, an autoimmune disorder in which antibodies, specifically thyroid-stimulating antibodies (TSAb), a subtype of TSH receptor antibodies (TRAb), bind to and activate TSH receptors...
The Thyroid Gland01:23

The Thyroid Gland

The thyroid gland is a small, butterfly-shaped gland located in the neck and covers the anterior surface of the trachea. The gland has two lateral lobes connected by a thin tissue mass called the isthmus. Internally, each lobe comprises many small spherical structures known as thyroid follicles, surrounded by a network of blood vessels.
The follicles have a central cavity lined by simple cuboidal to squamous epithelial cells called follicular cells. These cells produce the glycoprotein...

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Related Experiment Videos

[Thyroid and pregnancy].

Léa Maria Zanini Maciel1, Patrícia K R Magalhães

  • 1Divisão de Endocrinologia, Departamento de Clínica Médica, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brasil. lmzmacie@fmrp.usp.br

Arquivos Brasileiros De Endocrinologia E Metabologia
|December 17, 2008
PubMed
Summary
This summary is machine-generated.

Pregnancy increases thyroid hormone demand, affecting thyroid function tests. Special management is crucial for pregnant women with thyroid disease or iodine deficiency to prevent complications.

Related Experiment Videos

Area of Science:

  • Endocrinology and Reproductive Medicine
  • Thyroid Disorders in Pregnancy

Context:

  • Pregnancy significantly elevates thyroid hormone requirements early in gestation.
  • Physiological changes during pregnancy alter thyroid function and diagnostic test results.
  • Iodine sufficiency is critical for maintaining thyroid equilibrium during pregnancy.

Purpose:

  • To highlight the physiological adjustments in thyroid function during pregnancy.
  • To emphasize the challenges in thyroid management for women with pre-existing thyroid disease or iodine deficiency.
  • To underscore the importance of careful diagnosis and management of thyroid nodules in pregnant individuals.

Summary:

  • Increased thyroid hormone production is essential in early pregnancy.
  • Thyroid dysfunction (hypothyroidism, hyperthyroidism) poses risks to both mother and fetus.
  • Thyroid nodules require accurate differentiation between benign and malignant during pregnancy.

Impact:

  • Informs clinical practice regarding thyroid monitoring and management in pregnant patients.
  • Stresses the need for early identification and intervention for thyroid abnormalities in gestation.
  • Contributes to understanding the maternal-fetal implications of thyroid dysfunction during pregnancy.