homeostasis - homeostasis and the nervous system Flashcards
(13 cards)
in order to work, what do enzymes and cells require
very stable conditions
what is homeostasis
the regulation of the internal conditions of a cell or organism to maintain the optimum conditions for function in response to internal and external changes
what does homeostasis consist of
automatic control systems
what does the automatic control systems in the body involve
nervous system or hormones
what are the three features of the automatic control system
receptor cells, co-ordinator and effector
what do receptor cells detect
changes in the environment e.g. internal conditions such as concentration of glucose int he blood
what do scientists call changes to the environment
a stimulus
where do the receptor cells pass the information to
the co-ordination centre
what are some examples of a co-ordination center in the body
brain, spinal chord or the pancreas
what happens at the co-ordination centre
it receives and processes the information from the receptor cells
where does the co-ordination centre send the instructions
the effector
what is an effector
a muscle or a gland
what is the job of the effector
to carry out a response - restore the optimum level
