PLN 103 Lecture Notes - Lecture 12: Common Bile Duct, Bile Duct, Common Hepatic Duct
13 Dec 2016
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Control of homeostasis: stimulus changes the environment, receptor sensitive to the change, control center processes the info and sends out the command, effector responds to command to fix change. Aims to minimize change and keep in normal range. Example: exercising in heat, fever, increased blood pressure: positive feedback. Initial stimulus produces an exaggerated or enhanced response to the change. Three components specialized cells, extracellular protein fibres, and ground substance. Classifications: loose connective tissue (around organs, dense connective tissue (tendons, ligaments, etc, special connective tissue (cartilage, bone, blood) Responsible for body movement (moves blood, food and waste through body organs) There are three types: skeletal (large body muscles), cardiac (heart wall), and smooth muscle (organ and blood vessel wall) Conducts impulses to and from organs via neurons. Three elements brain, spinal cord, and nerves. Melanocytes synthesize melanin (gives skin colour) Merkel b/w epidermis and dermis (sensory)
