Homeostasis describes all of the processes that happen in a cell or organism to maintain (keep) conditions optimal. This is needed to respond to changes in the internal and external environment.
Control systems use both nervous and chemical responses. Control systems are made up of three parts:
When our internal conditions are optimal, the body does not need to respond. If an internal condition changes and is no longer optimal, this stimulus is detected and the body works to counteract (reverse) the change and return conditions to the optimum. This process is called negative feedback and needs all of the components of the nervous system to work together.
Join Seneca to get 250+ free exam board specfic A Level, GCSE, KS3 & KS2 online courses.