Hormones are divided into three types: |
1. |
steroids |
2. |
proteins or polypeptides |
3. |
amines. |
Insulin is a protein hormone which is secreted by β-cells of the pancreas. Insulin was the first polypeptide in which the amino acid sequence was experimentally determined. Its deficiency leads to diabetes mellitus.
Vitamins
The organic compounds other than carbohydrates, proteins and facts which are required by body to maintain normal health, growth and nutrition are called vitamins.
The vitamins are complex organic molecules. They are represented by letters such as A, B, C, D, E, K.
Vitamins are broadly classified into two types, 1. Water soluble vitamins and 2. oil soluble vitamins.