Thyroid
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  Thyroid



Thyroid

    The gland in the throat that synthesizes thyroid hormones that affect metabolism.

RELATED TERMS
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Gland
An organ that releases a chemical. Endocrine glands are ductless and secrete hormones directly into the bloodstream. Exocrine glands secrete externally, either through a tube or duct.

Thyroid
The gland in the throat that synthesizes thyroid hormones that affect metabolism.

Hormones
Biological compounds that communicate information at a distance. Hormones require specific receptors to begin their biological action and use second messengers to initiate the cellular process that uses that information.

Affect
This word is used to described observable behavior that represents the expression of a subjectively experienced feeling state (emotion). Common examples of affect are sadness, fear, joy, and anger. The normal range of expressed affect varies considerably between different cultures and even within the same culture. Types of affect include: euthymic, irritable, constricted; blunted; flat; inappropriate, and labile.

Metabolism
The chemical activity that occurs in cells, releasing energy from nutrients, or using energy to create other substances, such as proteins.



SIMILAR TERMS
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Thyrel trh
Thyrel trh is a prescription or over-the-counter drug which is (or once was) approved in the United States and possibly in other countries. Active ingredient(s): protirelin.

Thyro-block
Thyro-block is a prescription or over-the-counter drug which is (or once was) approved in the United States and possibly in other countries. Active ingredient(s): potassium iodide.

Thyro-tabs
Thyro-tabs is a prescription or over-the-counter drug which is (or once was) approved in the United States and possibly in other countries. Active ingredient(s): levothyroxine sodium.

Thyrogen
Thyrogen is a prescription or over-the-counter drug which is (or once was) approved in the United States and possibly in other countries. Active ingredient(s): thyrotropin alfa.

Thyroglobulin
Thyroglobulin is a prescription or over-the-counter drug which is (or once was) approved in the United States and possibly in other countries. Active ingredient(s): thyroglobulin.

Thyroid scan
Uses a radioactive substance to create an image of the thyroid as it is functioning.

Thyroid Stimulating Hormone (TSH)
A hormone secreted by the anterior pituitary gland, that controls the production and release of the thyroid hormones (T4 and T3). Measurement of the TSH level in the bloodstream is commonly done as a screening tool for hypothyroidism and hyperthyroidism, and as an assessment of the adequacy of therapy in people who are taking thyroid hormone pills as therapy. Typically, high values of TSH are associated with hypothyroidism, and absence of TSH is associated with hyperthyroidism.

Thyroid-Releasing Hormone (TRH)
The hormone released from the hypothalamus. It instructs the pituitary to release TSH.

Thyroid-Stimulating Hormone (TSH)
The hormone released from the pituitary that causes the thyroid gland to produce T4 hormone. TSH uses the second messenger cyclic AMP to initiate the synthesis of T4.

Thyrolar-0.25
Thyrolar-0.25 is a prescription or over-the-counter drug which is (or once was) approved in the United States and possibly in other countries. Active ingredient(s): liotrix t4;t3.

Thyrolar-0.5
Thyrolar-0.5 is a prescription or over-the-counter drug which is (or once was) approved in the United States and possibly in other countries. Active ingredient(s): liotrix t4;t3.

Thyrolar-1
Thyrolar-1 is a prescription or over-the-counter drug which is (or once was) approved in the United States and possibly in other countries. Active ingredient(s): liotrix t4;t3.

Thyrolar-2
Thyrolar-2 is a prescription or over-the-counter drug which is (or once was) approved in the United States and possibly in other countries. Active ingredient(s): liotrix t4;t3.

Thyrolar-3
Thyrolar-3 is a prescription or over-the-counter drug which is (or once was) approved in the United States and possibly in other countries. Active ingredient(s): liotrix t4;t3.

Thyrolar-5
Thyrolar-5 is a prescription or over-the-counter drug which is (or once was) approved in the United States and possibly in other countries. Active ingredient(s): liotrix t4;t3.

Thyrosafe
Thyrosafe is a prescription or over-the-counter drug which is (or once was) approved in the United States and possibly in other countries. Active ingredient(s): potassium iodide.

Thyroshield
Thyroshield is a prescription or over-the-counter drug which is (or once was) approved in the United States and possibly in other countries. Active ingredient(s): potassium iodide.

Thyroxin (T4)
A hormone secreted by the thyroid gland which regulates metabolism.



PREVIOUS AND NEXT TERMS
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Tissue
Biological tissue is a group of cells that perform a similar function.The study of tissues is known as histology, or, in connection with disease, histopathology.The classical tools for studying the tissues are the wax block, the tissue stain, and the optical microscope, though developments in electron microscopy, immunofluorescence, and frozen sections have all added to the sum of knowledge in the last couple of decades.

Thymine
A nitrogenous base, one member of the base pair AT (adenine-thymine).

Telomer
A small segment at the end of nuclear DNA that becomes shorter with every replication of the DNA. DNA will no longer replicate beyond a certain point of telomere reduction.

Testosterone
The hormone that promotes the building of muscle mass in males and libido in both sexes.

Thymus
The gland responsible for the production of certain white cells known as T-lymphocytes that are important for immune function. The thymus is very sensitive to excess cortisol.

Thyroid

Thyroid-Releasing Hormone (TRH)
The hormone released from the hypothalamus. It instructs the pituitary to release TSH.

Thyroid-Stimulating Hormone (TSH)
The hormone released from the pituitary that causes the thyroid gland to produce T4 hormone. TSH uses the second messenger cyclic AMP to initiate the synthesis of T4.

Triglycerides (TG)
The form of fat found in various lipoproteins in the bloodstream. High levels of triglycerides are usually indicative of high levels of insulin. The ratio of TG/HDL is a powerful indicator of insulin levels and is strongly predictive of future cardiovascular events.

Type 2 Diabetes
A diabetic condition characterized by the overproduction of insulin (hyperinsulinemia), increased AGE production, and decreased longevity.

T3
The active form of T4 synthesized in the peripheral tissue.

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