Ch41_hormones_review

Ch41_hormones_review - Chapter 41 Animal Hormones I What...

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Chapter 41: Animal Hormones I. What are hormones? o In multicellular animals, information is transmitted as electric signals and as chemical signals . o The chemical signals are hormones , secreted by cells of the endocrine system into the extracellular fluid. o The cells that secrete hormones are called endocrine cells , and the cells that have receptors for those hormones are called target cells o Hormones that affect only target cells near their release site, they are called paracrine hormones ex. Histamine o When a hormone influences the cell that released it, it is said to have an autocrine function. II. The existence and function of insect hormones was experimentally demonstrated many years before the hormones were identified chemically. o Be able to elaborate on the experiments discussed in the text. III. Three types of chemical structures of hormones: Peptides (or polypeptides): Water soluble Released into circulation by exocytosis. Steroids:
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This note was uploaded on 10/26/2011 for the course LS 2 taught by Professor Pires during the Spring '08 term at UCLA.

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Ch41_hormones_review - Chapter 41 Animal Hormones I What...

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