groups of cells that can detect a change in your environment
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Stimulus
Change in environment
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nervous (electrical) impulse
When a stimulus is detected by receptors the information is converted to this
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CNS
Central nervous system - spinal cord, brain
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Relay neurones
Impulses travel along this after the CNS coordinates a response (deciding what to do about the stimulus)
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Effector
The CNS sends information to this along a motor neurone and the ... responds accordingly.
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Reaction time
The time it takes you to respond to a stimulus
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Pathway for a nervous response
Stimulus, receptor, sensory neurones, CNS (brain), motor neurone, effector, response
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Neurones
Transmit information rapidly as electrical impulses.
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Dendrites
Carry nerve impulses towards the body
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Axons
Carry impulses away from the cell body.
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Sensory neurone
One long dendron carries nerve impulses from receptor cells to the cell body, which is located in the middle of the neurone.
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Motor neurone
Many short dendrites carry nerve impulses from the CNS to the cell body. Long axon carries nerve impulses from cell body to effector cells.
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Relay neurone
Many short dendrites carry nerve impulses from sensory neurones to the cell body
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Size order
mm, um, nm, pm
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pH on enzyme
Too high/low, pH interferes with the bonds holding the enzyme together. This changes the enzymes active site and denatures the enzyme.
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Synapses
The connection between neurones
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Neurotransmitters
the nerve signal is transferred by chemicals called this... which diffuse across the gap.
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Reflexes
Rapid, automatic reactions to stimuli, reduces the chance of injury
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Reflex arc
Passage of information in a reflex
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Order of reflex
Stimuli, pain receptor, impulses travel along sensory neurone, impulse passed along a relay neurone, impulses travel along motor neurone, when impulses reach muscle it contracts
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Other cards in this set
Card 2
Front
Change in environment
Back
Stimulus
Card 3
Front
When a stimulus is detected by receptors the information is converted to this
Back
Card 4
Front
Central nervous system - spinal cord, brain
Back
Card 5
Front
Impulses travel along this after the CNS coordinates a response (deciding what to do about the stimulus)
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