Endocrine system Notes

Chapter 39 Notes The Endocrine System The endocrine system is do of glands that move around their products into the bloodstream. There products broadcast messaged finishedout the body. internal secretions be chemical substance substances that travel with the bloodstream and affect the activities of other cubicleular phones. They obligate to specific chemical receptors on those cells. Cells that have receptors for a typesetters case endocrine gland ar called target cells. If a cell doesnt have a particular receptor or receptors that dont answer to the hormone, then the hormone has no effect on it. Glands are organs that reachs and rids a substance, or secretion. Exocrine glands release their secretions through tube like structures called ducts. These embroil sweat, teas, and digestive juices. Endocrine glands release their secretions (hormones) directly into the bloodstream. steroid hormone hormones Made of lipid called cholesterol gull cell tissue layers easil y 1.         Enters cell by passing though its tissue layer 2.         Binds to a steroid receptor proteins (target cells only) forming hormone-receptor complex 3.         Hormone receptor complex enters nucleus of cell binds to DNA take care sequence 4.         Binding initiates transcription of specific genes to template ribonucleic acid 5.

        mRNA moves into the cytoplasm and directs protein synthesis Hormone-receptors complexes work regularly Steroid hormones affect gene expression directly, produce dramatic changed in cell and organism act ivity Non-steroid hormones Made of proteins! , small peptides, and limited amino acids Generally cigarettenot pass through cell membrane 1.         Binds to receptor on cell membrane 2.         Binding disturbed an enzyme on inner get on of cell membrane 3.         Enzyme activated secondary messaged that carry the message of the hormone at heart the cell. Calcium ions, cAMP (cyclic adenosine monophosphate), nucleotides, and even fatty acids can manage as second messengers. 4.         Once released, these second messengers activated a wide range of other cell activates Other than red blood cells, all cells have been shown to produce... If you want to get a full essay, order it on our website: OrderCustomPaper.com

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