SureDenHormones
Hormones: These are information containing chemical messengers which are secreted by endocrine glands and carried by blood to the place of their action, where they have to produce their effect.
They are of 4 types:
1.Amino Acid derivatives: Some hormones have derivatives of amino acids. Ex: epinephrine and nor-epinephrine are derived from tyrosine amino acid.
2.Peptides: Peptides are of 2 type:
i)Short peptides: ex. – oxytocinand vasopressin
ii)Long peptides: parathormone, Calcitonin, insulin, glucagon etc.
3.Proteins (Polypeptides): gonadotrophic, somatotrophic, thyrotrophic are proteins.
Trophins (they stimulate endocrine glands to stimulate its hormone).
4.Steroids: Hormones from ovaries, placenta, adrenal cortex are steroids.
Different between Hormones and Enzyme:
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Hormones |
Enzymes |
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1. Hormones may be amino acid derivatives, peptides, protein or steroids in nature. |
1. All enzymes are complex proteins. |
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2. They can work slow/fast. |
2. They work very fast. |
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3. They diffuse through blood. |
3. They diffuse through cells or ducts. |
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4. Their action is irreversible. |
4. Their action is reversible. |
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5. They are more effective at their low concentration. |
5. They are more effective at their high concentration. |
Difference between Hormones and Vitamins:
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Hormones |
Vitamins |
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1. They are formed in body itself. |
1. They are taken by animal in their diet. |
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2. Their excess & deficiency both causes deficiency disorders. |
2. Their deficiency causes deficiency disorder. But excess of vitamins are excreted out of body. |
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3. They are amino acid derivatives, peptides, proteins or steroids. |
3. They are simple organic compounds such as amines, etc. |