What it means
The two forms are thyroxine (T4) and triiodothyronine (T3); the body makes them using iodine. They affect heart rate, body temperature, weight, energy and growth. Too little causes hypothyroidismhy-poh-THY-roy-diz-umA condition in which the thyroid gland makes too little thyroid hormone.hypo- below, underthyr/o thyroid gland-ism conditionFull entry and too much causes hyperthyroidismhy-per-THY-roy-diz-umA condition in which the thyroid gland makes too much thyroid hormone.hyper- above, overthyr/o thyroid gland-ism conditionFull entry . Levothyroxine is a lab-made form used as a drug.
At a glance
| Spanish | hormona tiroidea |
|---|---|
| Also written | thyroid hormones |
Related terms
hypothyroidism
A condition in which the thyroid gland makes too little thyroid hormone.
hyperthyroidism
A condition in which the thyroid gland makes too much thyroid hormone.
thyr/o
A word part that means the thyroid gland.
Graves disease
An autoimmune disease in which antibodies make the thyroid gland overactive.