Question

Define and explain thyroid hormone? Draw diagram?

Answer 1

See Below.

Explanation:

Thyroid Hormones are a bunch of hormones which are secreted from the endocrine gland, Thyroid.

It consists of Amine Hormones and Peptide Hormones.

i)Tri-iodothyronine and Tetra-iodothyronine:- These Hormones are derived from the Amino Acid Tyrosine, with Iodine attached. The number of Iodine atoms is indicated by the prefix tri- or tetra-.

These hormones control the metabolism of the whole body. They act to increase the BMR (Basal Metabolic Rate), Affect Protein Synthesis, etc. They are essential to the proper development and the heat generation to the body.

Here is an diagram of how they work.

ii)Calcitonin or Thyrocalcitonin:- Polypeptide Hormone, produced in C-Cells.

Main Function of Calcitonin is to decrease the `Ca^(2+)` and `P^(3-)` ions from blood, and deposit them on bones. This, indirectly leads to bone development, and prevents the loss of Calcium from blood while lactation in females.

To Know more, Visit this sites:-

i) Wikipedia - Thyroid Hormones

ii) Wikipedia - Calcitonin

Hope this helps.