What is the thyroid and how does it work?
The thyroid is a gland located in the front of the neck and it
produces two hormones T3 and T4.
These hormones work to regulate your metabolism, which is your
body’s ability to break down food and convert it to energy. The food we
eat to fuel our body burns at different rates, which is why some people
are said to have a fast or slow metabolism.
The thyroid keeps controls metabolism through the action of
thyroid hormone, which it makes by extracting iodine from the blood and
incorporating it into thyroid hormones. Thyroid cells are highly
specialized to absorb and use iodine. Every other cell depends on the
thyroid to manage its metabolism.
The pituitary gland and hypothalamus both control the thyroid.
When thyroid hormone levels drop too low, the hypothalamus secretes TSH
Releasing Hormone (TRH), which alerts the pituitary to produce thyroid
stimulating hormone (TSH). The thyroid responds to this chain of events
by producing more hormones
Common causes for diseases and disorders that can be associated
with the thyroid are:
·
Hypothyroidism --the thyroid produces too little hormone
·
Hyperthyroidism --the thyroid produces too much hormone
·
Nodules or lumps within the thyroid
·
Thyroid cancer
These diseases and disorders include:
·
Goiter –a bulge in the neck
·
Solitary thyroid nodules –or small lumps in the thyroid, usually
benign and quite common, usually a fine needle biopsy will determine if
the nodule is cancerous
·
Thyroid cancer –long term survival rates are excellent
· Thyroiditis -- an inflammation of the thyroid that may be associated with abnormal thyroid function. Inflammation can cause the thyroid’s cells to die, making the thyroid unable to produce enough hormones to maintain the body's normal metabolism.
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