SNAB topic 8- Grey Matter

A2 Biology topic 8 edexcel (SNAB)

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1. What is the function of a relay neurone?

  • carry impulses to an effector
  • contract muscles
  • carry impulses to a receptor
  • links sensory and motor neurones
  • Carry impulses from the receptor
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2. Which of these is true in relation to the eye in bright light?

  • none of the above
  • radial and circular muscles relax
  • radial muscles contract, circular muscles relax
  • Radial muscles relax, circular muscles contract
  • radial and circular muscles contract

3. What measurement is the resting potential in a neurone?

  • -40mV
  • +40mV
  • +70mV
  • -70mV
  • 0mV

4. The point where two neurones meet is called a...

  • node of ranvier
  • synapse
  • vesicle
  • axon
  • neurotransmitter

5. What is spatial summation?

  • when lots of impulses arrive from different neurones
  • all the impulses arrive at a synapse form the same neurone
  • none of the above
  • when neurones are far apart
  • when synapses are blocked
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Innocent Flowerserpent

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Surely Skinner's rats will be an example of Operant conditioning as well?

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