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 .