The endocrine system, in humans, comprises several ductless glands that regulate the body functions or evoke certain responses in the body.
Endocrine System
Hormones are chemicals that affect a lot of the bodily functions ranging from hunger, reproduction and growth to much more complicated functions like human emotions and behaviour.
Secretin: First discovered hormone
In this type of mechanism Steroid hormone and Thyroxine hormones are involved:
a) Steroid Hormones
b) Thyroxine Hormone
Following hormones are an example of this mechanism:
a) Tyrosine Kinase Mechanism
Tyrosine Kinase Mechanism
Binding to the Receptor
c) C-AMP or Second Messenger System
This C-AMP mechanism has been shown by the following hormones:
d) Amplification
e) IP3 & DAG Mechanism
IP3 and DAG Mechanism
PIP = Phosphatidylinositol bisphosphate
DAG = Diacylglycerol IP = Inositol trisphosphate
Short Peptides
Long Peptides
Protein
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1. What is the main function of the endocrine system? |
2. How do hormones differ from enzymes? |
3. What is the source and chemical nature of hormones? |
4. How do hormones differ from vitamins? |
5. What are the types of molecular mechanisms of hormones and hormonal reactions? |
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