The nervous system Flashcards
what is the nervous system
a network of nerve tissue that controls and communicates with the body.
why do we need the nervous system
allows the body to communicate with itself and the outside world
what is the nervous system made up of
central nervous system, sensory neurons, motor neurons and effectors
what is the central nervous system and what does it do
in vertebrates (animals with backbones) this consists of the brain and spinal cord only. In mammals, the CNS is connected to the body by sensory neurons and motor neurons.
what are the sensory neurons
the neurons that carry information as electrical impulses from the receptors to the CNS
what are the motor neurons
the neurons that carry electrical impulses from the CNS to effectors
what are effectors
all your muscles and glands, which respond to nervous impulses
what are receptors
the cells that detect stimuli
what are the two types of effectors
muscles and glands - they respond in different ways. muscles contract in response to a nervous impulse, whereas glands secrete hormones.
in what order the nervous system go
stimulus —} receptor —} sensory neuron —} CNS —} motor neurone —) effector —) lastly response.
