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31 gru 2015 · The hormones associated with the endocrine system utilize autocrine, paracrine, or endocrine actions on the cells of their target tissues within these physiologic systems to adjust...
26 wrz 2022 · The nuclear actions of T3 depend on 4 factors: availability of hormone, thyroid hormone nuclear receptors (TRs), receptor cofactors, and DNA regulatory elements. Within most tissue, T3 enters by simple diffusion. However, T3 is actively transported into cells in the brain and thyroid.
concepts of hormonal regulation in a brief, accessible way, with plenty of illustrative and reference material. In addition to theoretical information, the book also provides a large volume of supplementary data that illustrate the sources and types of the secretion of signalling compounds; the
endocrine regulation. The end-product or negative regulator can either be an inor-ganic ion or a metabolite (e.g., calcium for PTH) or a hormonal product in the endocrine cascade (e.g., thyroid hormone for TSH, IGF-1 for GH, cortisol for ACTH), since many hormones are linked to the hypothalamus-pituitary (HP)-axis.
Most hormones are regulated by feedback mechanisms. A feedback mechanism is a loop in which a product feeds back to control its own production. Most hormone feedback mechanisms involve negative feedback loops. Negative feedback keeps the concentration of a hormone within a narrow range.
The endocrine system comprises glands and tissues that secrete hormones to regulate and coordinate vital functions in the body. Endocrine glands differ from exocrine glands by releasing their secretions directly into the bloodstream, rather than a central duct.
This Osmosis High-Yield Note provides an overview of Anatomy and Physiology of the Endocrine System essentials. All Osmosis Notes are clearly laid-out and contain striking images, tables, and diagrams to help visual learners understand complex topics quickly and efficiently.
