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Related Concept Videos

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...
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...
Anticoagulant Drugs: Low-Molecular-Weight Heparins01:30

Anticoagulant Drugs: Low-Molecular-Weight Heparins

Hemostasis is a crucial process that prevents excessive blood loss from damaged blood vessels. It involves various mechanisms such as vasoconstriction, platelet adhesion and activation, and fibrin formation. The importance of each mechanism depends on the type of vessel injury. In contrast, thrombosis is the abnormal formation of a blood clot within the blood vessels, leading to potential complications if the clot obstructs blood flow. Thrombosis can be caused by increased coagulability of the...
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...
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...

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Related Experiment Video

Updated: May 12, 2026

Measurement of Factor V Activity in Human Plasma Using a Microplate Coagulation Assay
13:08

Measurement of Factor V Activity in Human Plasma Using a Microplate Coagulation Assay

Published on: September 9, 2012

Factor VIII activity and thyroid function.

J S Rogers, S R Shane, F S Jencks

    Annals of Internal Medicine
    |November 1, 1982
    PubMed
    Summary
    This summary is machine-generated.

    Thyroid function impacts blood clotting. Hypothyroidism lowered factor VIII activity, while hyperthyroidism increased it. Thyroid treatment normalized these factor VIII levels in patients.

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    Last Updated: May 12, 2026

    Measurement of Factor V Activity in Human Plasma Using a Microplate Coagulation Assay
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    Published on: September 9, 2012

    Helical Organization of Blood Coagulation Factor VIII on Lipid Nanotubes
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    Helical Organization of Blood Coagulation Factor VIII on Lipid Nanotubes

    Published on: June 3, 2014

    Extracellular Vesicle Tissue Factor Activity Assay
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    Area of Science:

    • Endocrinology
    • Hematology
    • Thrombosis

    Background:

    • Thyroid hormones influence various physiological processes, including hemostasis.
    • Previous observations suggest a correlation between thyroid status and plasma factor VIII coagulant activity.

    Purpose of the Study:

    • To investigate the relationship between thyroid dysfunction (hypothyroidism and hyperthyroidism) and factor VIII-related properties.
    • To assess the effect of thyroid hormone replacement or suppression therapy on these properties.

    Main Methods:

    • Studied 21 untreated hypothyroid patients and 22 untreated hyperthyroid patients.
    • Measured factor VIII coagulant activity, factor-VIII-related antigen, and ristocetin cofactor activity.
    • Monitored changes in these parameters following thyroid replacement therapy (hypothyroid) or antithyroid treatment (hyperthyroid).

    Main Results:

    • Hypothyroid patients showed decreased factor VIII coagulant activity, antigen, and cofactor levels.
    • Hyperthyroid patients exhibited significantly increased factor VIII coagulant activity, antigen, and cofactor levels.
    • Thyroid treatment normalized factor VIII-related properties in both hypothyroid and hyperthyroid groups.

    Conclusions:

    • Thyroid status significantly affects factor VIII-related properties.
    • Both hypothyroidism and hyperthyroidism disrupt normal hemostatic balance related to factor VIII.
    • Restoration of euthyroidism normalizes factor VIII levels, suggesting a direct link between thyroid hormones and factor VIII regulation.