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Triiodothyronine (T3)
Triiodothyronine (T3) A hormone secreted by the thyroid gland which regulates metabolism; exerts the same biological effects as thyroxine, but is generally more potent and the onset of its effect is more rapid.
RELATED TERMS--------------------------------------
Hormone
A chemical substance formed in the body that is carried in the bloodstream to affect another part of the body; an example is thyroid hormone, produced by the thyroid gland in the neck, which affects growth, temperature regulation, metabolic rate, and other body functions.
Thyroid
The gland in the throat that synthesizes thyroid hormones that affect metabolism.
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.
Metabolism
The chemical activity that occurs in cells, releasing energy from nutrients, or using energy to create other substances, such as proteins.
SIMILAR TERMS--------------------------------------
PREVIOUS AND NEXT TERMS--------------------------------------
Trophoblast
A granular protoplasmic body; a plastid, formed from , eventually surrounds the entire embryo; insert themselves between uterine epithelial cells, then spread along the epithelial surface of the basal lamina that underlies the endometrial epithelium to form a trophoplate.
Telophase
The final stage of mitosis in which the chromosomes migrate to opposite poles, a new nuclear envelope forms, and the chromosomes uncoil. The last phase of nuclear division in eukaryotes when the segregated chromosomes uncoil and begin to reform nuclei. This is immediately followed (in most cases) by cytokinesis.
Testis
(plural testes). A male's testes are located in a pouch that hangs suspended outside his body. The testes produce testosterone and sperm.
Thyroid scan
Uses a radioactive substance to create an image of the thyroid as it is functioning.
Thyroxin (T4)
A hormone secreted by the thyroid gland which regulates metabolism.
Triiodothyronine (T3)
Type 1 Diabetes
A condition in which the body's immune system destroys the cells in the pancreas that produce insulin. Insulin allows glucose to enter the cells of the body to provide energy. Persons with type 1 diabetes must take daily insulin injections.
Tetracycline
Tetracycline is an antibiotic produced by the streptomyces bacterium, indicated for use against many bacterial infections.
Trimethoprim
Trimethoprim is a bacteriostatic antibiotic mainly used in the prophylaxis and treatment of urinary tract infections (cystitis). It belongs to the class of chemotherapeutic agents known as dihydrofolate reductase inhibitors.
Tetraplegia
Paralysis of all four extremities only. Another term for quadriplegia.
Tay Sachs Disease
An inherited autosomal recessive condition that causes a progressive degeneration of the central nervous system which is fatal (usually by age 5).
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