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Contents. Introduction. Synthesis and release of hormones. Functions of hormones. Classification of hormones. Mechanisms of hormones action. Regulation of hormone levels. Hormone inactivation. Feedback Control of Hormone Production. Introduction. Homeostasis, the tendency to maintain stability, is essential to survival.
This lecture covers endocrine development, note that a better understanding can be made if you understand the adult function of each endocrine organ (though this will not be covered in the Lecture). Endocrine development is sometimes divided into neuroendocrine and endocrine and is also generally covered piecemeal in all embryology
There are two types of hormones secreted in the endocrine system: Steroidal and non-steroidal, (or protein based) hormones. The endocrine system regulates its hormones through negative feedback, except in very specific cases like childbirth.
Classification by structure of the major human hormones*. Their functions can be broadly grouped into several categories: reproduction and sexual differentiation; development and growth; maintenance of the internal environment; and regulation of metabolism and nutrient supply.
Simple cuboidal cells (arrows) make up the follicles. C _ thyroid colloid (thyroglobulin), which fi lls the follicles. (From Borysenko, M. and Beringer, T. (1979) Functional Histology, 312. Little, Brown, Boston by permission of Lippincott, Williams and Wilkins, Philadelphia.) Black/green: FIGURE 7-11 Confocal fl uorescent microscope images of ...
26 wrz 2022 · This review elaborates on the organs that secret the specific hormone, the actions of the hormone, and where these actions occur. Also, it reviews several of the most common endocrine diseases involving hormones. The number of diseases covered is not comprehensive due to the extensive number of diseases and ongoing research in this area.
The nervous system controls homeostasis through nerve impulses and neurotransmitters, which act locally and quickly. The endocrine system uses hormones, which act more slowly in distant parts of the body. The nervous system controls neurons, muscle cells, and glandular cells.
