classification of hormones based on their mechanical action?

hormones are classified into how many types based on their mechanical action ,what are their biological roles and please explain them?

2 Answers

  • PIPI B
    Lv 4
    1 decade ago
    Favorite Answer

    You can generally classify them by 3 types. Non-steriod hormones, steroid hormones and peptide hormoes.

    Non-steroid are water soluble hormone diffuses from the blood and binds to its receptor in a target cell’s plasma membrane. As a result of binding a reaction starts inside the cell that converts ATP into cyclic AMP. An example would be T3 aka Thyroxine.

    Peptide hormones would bind to the surface receptors and then causes the channel to be opened. They would then enter the cell and bind to the necessary stuffs to produce an effect. An example would be Thyroid stimulating Hormone aka TSH.

    Steriod hormones are lipid soluble hormone detaches from its transport protein in the bloodstream.This allowing the free hormones to diffuse form the blood into interstitial fluid through the plasma membrane into a cell. The hormone binds to and activates receptors within the cell altering the gene expression. An example would be Prostaglandins.

    Source(s): Anatomy and Physiology lesson.
  • Anonymous
    1 decade ago

    Types of hormones

    Vertebrate hormones fall into three chemical classes:

    Amine-derived hormones are derivatives of the amino acids tyrosine and tryptophan. Examples are catecholamines and thyroxine.

    Peptide hormones consist of chains of amino acids. Examples of small peptide hormones are TRH and vasopressin. Peptides composed of scores or hundreds of amino acids are referred to as proteins. Examples of protein hormones include insulin and growth hormone. More complex protein hormones bear carbohydrate side chains and are called glycoprotein hormones. Luteinizing hormone, follicle-stimulating hormone and thyroid-stimulating hormone are glycoprotein hormones.

    Lipid and phospholipid-derived hormones derive from lipids such as linoleic acid and arachidonic acid and phospholipids. The main classes are the steroid hormones that derive from cholesterol and the eicosanoids. Examples of steroid hormones are testosterone and cortisol. Sterol hormones such as calcitriol are a homologous system. The adrenal cortex and the gonads are primary sources of steroid hormones. Examples of eicosanoids are the widely studied prostaglandins.

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