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Flashcards in The nervous system Deck (12)
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1

the 5 senses are?

hear
touch
taste
sight
smell

2

nerve cells

work electro chemically;
signals jump chemically and join electrically
send impulses to synapses via ions
difference in voltage case impulse from axon to synapse (action potential)

3

what level does a stimulus need to reach to be detected?

the sensory threshold

4

sensory adaption

repeated stimuli so not noticed
no control over it
eg. clothes on body or watch

5

habituation

decrease in physiological and behavioural response from repeated exposure
under your conscious control
eg. tuning in and out of conversations at a party

6

central nervous system comprises of?

brain
spine
has relay neurones

7

peripheral nervous system contains?

nerves outside CNS
responsible for reflex
contains sensory & motor neurones

8

stimulus to brain uses?

sensory neurones

9

reaction from brain to muscles uses?

motor neurones

10

autonomic nervous system

outside our conscious control
blinking, breathing, heartbeat etc
highly self regulating
maintain levels and balance of body systems- homeostasis
neuro hormonal -combination of neurones and hormone transmitters
2 subdivisons
sympathetic & parasympathetic

11

autonomic nervous system - sympathetic

responsible for preparing us for action
eg secreting adrenaline

12

autonomic nervous system- parasympathetic

returns body o normal levels