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biology paper 2
reflexes
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what are reflexes?
reflexes are
rapid
,
automatic
responses to certain stimuli that don't involve the conscious part of the brain
what is a reflex arc?
the passage of information in a
reflex
(
receptor
to effector )
true or
false. reaction time
is the time it takes to detect a
stimulus
false. reaction time is the time it takes to respond to a
stimulus
reflexes
do not involve conscious parts of the brain. why is this advantageous?
it reduces the chance of an
injury
, as it means that reflexes can be
rapid
and automatic
alcohol is a depressant which recurs the effectiveness of neurone signalling. suggest what effect this would have on a persons reaction time.
reaction time will be
slower
because the nerve signals take
longer
to transmit around the body, so the response takes longer
name three types of neurone in a reflex arc.
relay
neurone
sensory
neurone
motor
neurone
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