nervous system Flashcards
(14 cards)
nervous system consists of..
brain, spinal cord - makes up CNS ( central nervous system )
receptors and effectors
reflex
three types of neurons are…
sensory, motor and relay
a reflex action is…
an automatic rapid response to a stimulus
reflex action sequence… ( s, r , s , r , m ,e , r )
stimulus, receptor, sensory neurone, relay neurone , motor neurone, effector, response
reflex arc is…
the pathway of information from a sensory neuron through an inter neuron to a motor neuron
structure and function of a sensory neurone
one long dentron carries nerve impulses from receptor cells to the cell body
one short axon carries nerve impulses from the cell body to the cns
structure and function of motor neurone
many short dendrites carry nerve impulses from the cns to the cell body
one long axon carries nerve impulses from the cell body to effector cells
structure and function of relay neurone
many short dendrites carry nerve impulses from sensory neurones to the cell body
an axon carries nerve impulses b from the cell body to motor neurones
connection between two neurones is called…
synapse
the nerve signal is transmitted by chemicals called..
neurotransmitters
the passage of information in a reflex is called a …
reflex arc
when a stimulus is detected by the receptors impulses are sent along a …
sensory neurone to a relay neurone in the CNS
when the impulses reach the synapse between the sensory neurone and the relay neurone, they trigger…
neurotransmitters to be released and sent through the relay neurone
what detects light in an eye?
light receptors
