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. hormones be chemic substances that travel by means of the bloodstream and affect the activities of other cubicleular phones. They concord to specific chemical receptors on those electric cells. Cells that have receptors for a shell endocrine gland are called target cells. If a cell doesnt have a particular receptor or receptors that dont oppose to the hormone, then the hormone has no effect on it. Glands are organs that reachs and unloosens 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 surmount cell tissue layers easily 1. Â Â Â Â Â Â Â Â Enters cell by passing though its membrane 2. Â Â Â Â Â Â Â Â Binds to a steroid receptor proteins (target cells only) forming hormone-receptor complex 3. Â Â Â Â Â Â Â Â Hormone receptor complex enters nucleus of cell binds to DNA sway sequence 4. Â Â Â Â Â Â Â Â 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 cir! cumscribed amino acids Generally cigarettenot pass through cell membrane 1.         Binds to receptor on cell membrane 2.         Binding worked up an enzyme on inner get on of cell membrane 3.         Enzyme activated secondary messaged that carry the message of the hormone within the cell. Calcium ions, cAMP (cyclic adenosine monophosphate), nucleotides, and even fatty acids can distribute as second messengers. 4.         Once released, these second messengers activated a wide range of other cell activates Other than cherry tree blood cells, all cells have been shown to produce... If you want to get a full essay, order it on our website:
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