BIOL373 Lecture Notes - Lecture 1: Paracrine Signalling, Homeostasis, Agonist
12 Jan 2017
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Document Summary
Physiology: the study of the normal functioning of a living organism and its parts and processes. Homeostasis: maintenance of a relatively stable internal environment, oscillation around a set point. Pathology: failure to compensate for change, disease prevents homeostasis from occurring. Local control: cells near the site of change initiate the response (ie. paracrine) Re ex control: cells at a distant site control the response, brain evaluates the change and initiates the response. Long range: cell-cell communication, method of achieving homeostasis in the body. Endocrine: acts over long distances, chemical signals dumped into extracellular space and then enters the bloodstream and is distributed throughout the body, slower and less speci c (normally not re ex responses due to slow speed) Neural: electrical signals travel down a neuron, electrical signal is converted into a chemical signal which transmits information to the responding cell, fast response, fairly speci c (re ex response since it is fast)
