HOMEOSTASIS overheads - Homeostasis: the regulatory...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
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.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 5

HOMEOSTASIS overheads - Homeostasis: the regulatory...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online