Endocrinology PDF
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Golden West College
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Summary
This document provides an overview of endocrinology, detailing different types of hormones, their functions, and storage mechanisms. It covers various classes of hormones, including proteins, polypeptides, and steroids. The text also touches upon the storage and release of hormones, highlighting the different mechanisms involved.
Full Transcript
Endocrinology - Neurotransmitter is released by axon terminals of neurons into synaptic junctions - Endocrine hormones: are secretion of glands into circulating blood - Neuroendocrine hormones are secretion of neurons into circulating blood - Paracrines secretion of cells into extr...
Endocrinology - Neurotransmitter is released by axon terminals of neurons into synaptic junctions - Endocrine hormones: are secretion of glands into circulating blood - Neuroendocrine hormones are secretion of neurons into circulating blood - Paracrines secretion of cells into extracellular fluid affect the neighboring cells of different types. - Autocines secretion of cells into extracellular fluid effect the function of the cells that produces them. - Cytokines: secretion of cells into extracellular fluid can work as paracrine autocrine and endocrine. Work as autocrine, paracrine and endocrine. Three general classes of hormones exist: - Proteins and polypeptides: hormones secreted by posterior and anterior pituitary gland, the pancreas (insulin and glucagon) parathyroid gland (parathyroid hormone, and many others. - Steroids: secreted by adrenal cortex (cortisol and aldosterone) ovaries and placenta (estrogen and progesterone) - Derivatives of the amino acid tyrosine, secreted by thyroid (thyroxine and triiodothyronine). Polypeptide and Protein Hormones Are Stored in Secretory Vesicles Until Needed - Polypeptides with >100 more amino acids are proteins - Polypeptides with
