25 Endo Principles

25 Endo Principles - PRINCIPLES OF ENDOCRINOLOGY page 1 AC...

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PRINCIPLES OF ENDOCRINOLOGY AC Brown page 1 A7d INTRODUCTION A. Hormones/Endocrines Hormones are substances secreted into the blood by specialized glands (endocrine glands) or specialized cells in other tissue. Note: there are two types of glands: endocrine glands (described above) and exocrine glands . Exocrine gland secrete their products either onto the surface of the body (e.g. sweat glands) or into the alimentary tract (e.g. salivary glands of the oral cavity, acid-secreting glands of the stomach). Note: There are several types of cell-to-cell chemical communication: gap junctions, synaptic transmission, paracrine/autocrine, and endocrine Gap Junctions Synaptic Paracrine & Autocrine Endocrine Chemical transmission Direct from cell- to-cell Diffuse across synaptic cleft Diffusion through interstitial fluid Transport by the circulation Site of action Adjacent cells Postsynaptic cell Nearby cells (P) or same cell (A) General (target tissue) Specificity due to Anatomic location Anatomic loca-
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This note was uploaded on 01/03/2012 for the course BIO 308 taught by Professor Acbrown during the Spring '10 term at Portland.

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25 Endo Principles - PRINCIPLES OF ENDOCRINOLOGY page 1 AC...

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