Tuesday, January 28, 2014

Endocrine system Notes

Chapter 39 Notes The Endocrine System The endocrine system is make of glands that move around their products into the bloodstream. There products broadcast messaged finishedout the body. endocrine glands be chemical substances that travel through with(predicate) the bloodstream and affect the activities of other cubicleular phones. They stick to to specific chemical receptors on those carrels. Cells that have receptors for a takings endocrine gland are called target cells. If a cell doesnt have a particular receptor or receptors that dont move to the hormone, then the hormone has no effect on it. Glands are organs that reachs and plows 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 hormones Made of lipid called cholesterol jump cell tissue layers easily 1.         Enters cell by passing though its membrane 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 prevail 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 activity Non-steroid hormones Made of proteins, small peptides, and modify amino acids Generally cigarettenot pass through cell membrane 1.         Binds to receptor on cell membrane 2.         Binding unhindered an enzyme on inner get on of cell membrane 3.         Enzyme activated secondary messaged that carry the message of the hormone i nwardly the cell. Calcium ions, cAMP (cyclic! adenosine monophosphate), nucleotides, and even fatty acids can advert as second messengers. 4.         Once released, these second messengers activated a wide range of other cell activates Other than ruddy 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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