B10 - The Human Nervous System (Only 10.1) Flashcards
what is homeostasis
The regulation of internal conditions of a cell or organism to maintain optimum conditions for function, in response to internal and external changes.
what are receptors
Cells that detect change in the internal and external environment.
what are coordination centres
Areas that recieve and process the information from receptors and send our signals to coordinate the response of the body. (Inc. brain, pancreas…)
what are effectors
Muscles or glands that bring about responses to the stimulus that has been received. These responses restore conditions in the body to optimum levels.
list 3 examples of internal conditions?
- body temperature
- water content of the body
- blood glucose concentration
what are neurones
Special cells that pass an electrical impulse with information in along them.
what are nerves
Bundles of hundreds/ thousands of neurons
CNS stands for?
Central nervous system
what is the central nervous system made up of
Brain and the spinal cord
what are sensory neurones
Cells that carry electrical impulses from your sense organs to CNS
what are motor neurones?
Cells that carry information from CNS to rest of body
what do stimuli do
Changes in the environment
What are reflexes
Automatic responses
eg: touch something hot and pull hand away
What are synpases
gaps between neurons.
extra: (Electrical impulse turn into chemical impulses to cross the synapses)
