HOMEOSTASIS overheads

HOMEOSTASIS overheads - Homeostasis: the regulatory...

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Homeostasis: the regulatory processes that maintain appropriate operating conditions within the body. If the internal environment can be maintained then the individual can cope with changes in the external environment. The information used to control the internal environment is carried by the: hormonal system nervous system. The body has fairly strict requirements for the conditions it needs to function. These are mainly related to energy production as a result of enzyme function which requires the correct pH, osmolarity and body temperature. Systems in our body which give it the capacity to achieve internal control The systems are described by control theory. THE COMPONENTS OF A CONTROL SYSTEM CONTROLLER afferent efferent pathway pathway FEEDBACK SENSORS EFFECTORS CONTROLLED VARIABLE The aspect of the internal environment which is being controlled is the controlled variable (eg blood pressure, body temperature, muscle tension). The body has a normal value at which it tries to keep the controlled variable: this is the set point. To control something, it must be measured. Sensors to measure actual value of the controlled variable. There must be somewhere to receive and analyse the information which is coming from the sensor. This analysing centre is the controller.
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HOMEOSTASIS overheads - Homeostasis: the regulatory...

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