lesson 2 the nervous system Flashcards
What is the CNS
central nervous system
where is the CNS located
in the brain or spinal cord
the receptor sends electrical impulses down where to the CNS
neurones
what are neurones
nerve cells
the co-ordination centre is also what
the CNS
the CNS sends electrical impulses down what to other effectors
neurones
the stimulus is detected by what
the receptor
electrical impulses pass from the receptor along a what
sensory neurone to the CNS
sensory neurones are connected to what
receptors
receptors allow us to do what
sense the environment
at the synapse, what releases
a chemical
the chemical from the synapse does what
diffuses across to a relay neurone in the CNS which triggers an electrical impulse
after the chemical diffuses to a relay neurone in the CNS which triggers an electrical impulse, that electrical impulse passes where
across the relay neurone and reaches another synapse
after the relay neurone s a chemical releases again as it reaches the synapse, what occurs
the chemical triggers an electrical impulse in a motor neurone
the electrical impulse after the relay neurone and synapse then passes where
down the motor neurone, to an effector
