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Thyroid Gland

Endocrine System overview of the Thyroid gland.
by

Alex Nixon

on 12 April 2012

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Transcript of Thyroid Gland

Thyroid
Gland One of the largest endocrine glands in the body.

It is shaped like a shield and is found just below your Adam's apple.

How quickly the body uses energy

How sensitive the body is to other hormones

It also produces a variety of protiens

It does so by producing thyroid hormones The Thyroid Thyroid Hormones The Thyroid Gland Controls Calcitonin Targets bone cells
Lowers blood calcium level by inhibiting loss of calcium from bone The thyroid gland
sets your
metabolic rate 3 4 Sources en.wikipedia.com
Mosby's Medical Dictionary, 8th edition. © 2009, Elsevier.
Raven Biology 6th Edition In amphibians the thyroid hormones are needed to complete metamorphosis and change from their larvae to adult form Fun
Fact If you feed an immature tadpole pieces of a thyroid gland, it will undergo metamorphasis and become a minature frog In Children The thyroid gland hormones control growth and simulate maturation of the central nervous system.

If a child was born with an underactive thyroid (hypothyroid) they will experience stunted growth and may suffer from severe mental retardation. This is known as a condition called cretinism. Mantains calcium levels in the blood
Does not serve a huge role in humans where Ca++ is controlled primarily by the parathyroid glands By Alex Nixon Thyroxine (T ) Targets most cells
Simulates metabolic rate which is essential to normal growth and development.
Acts as a catalyst in the body to influences metabolic rate, growth and development
Controls the metabolism of carbohydrates, fats, proteins, electrolytes and water
Aids in the bodies resistance to infection.
Triiodothyronine (T ) Helps to regulate both growth and development,
Helps to control metabolism and body temperature.
Acts as a negative-feedback system to inhibit the secretion of thyrotropin by the pituitary gland.
Triiodothyronine is produced mainly from the deiodination of thyroxine in the peripheral tissues but is also synthesized by and stored in the thyroid gland as an amino acid residue of the protein thyroglobulin.
The hormone is the most active thyroid hormone and affects all body processes, including gene expressions.


The thyroid secretes the smallest amounts of thiiodothyronine but thiiodothyronine is the most useful. Most of the time it is deionized in the tissues that need thiiodothyronine. can be
converted
into
Full transcript