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6. True or false: inhibitory post-synaptic potentials can undergo both spatial & temporal summation?

  • True
  • I'm sorry I haven't a clue
  • False
  • Pass

7. True or false: Inhibitory synapses tend to be close to the soma?

  • Hmm... Just a minute
  • true
  • Pass
  • False

8. What is the approximate resting membrane potentials of most neurons?

  • -65mV
  • +90mV
  • +65mV
  • -90mV

9. Which of the following groups are major inhibitory neurotransmitters?

  • GABA, glycine & endorphins
  • Noradrenalin, glycine & endorphins
  • ACh, adrenalin & GABA
  • ACh, noradrenalin & GABA

10. How do astrocytes maintain local homeostasis?

  • Take up K+ from the extracellular space, convert glutamate to glutamine, protect neurons from low [NH4], and allow flow of all liquids across the BBB
  • Take up K+ from the extracellular space, convert glutamate to glutamine, make sure neurons have a high [NH4], and maintain the BBB
  • Take up K+ from the extracellular space, convert glutamate to glutamine, protect neurons from high [NH4], and maintain the BBB
  • Take up Na+ from the extracellular space, convert glutamine to glutamate, protect neurons from high [NH4], and maintain the BBB

11. Complete the sentence: myelination of a neuron in the peripheral nervous system...

  • Increases the risk of inflammation within the axon
  • Decreases the metabolic demand because the Na+/K+ ATPases are localised to the nodes of Ranvier
  • Reduce the risk of inflammation within the axon
  • Increases the metabolic demand because the Na+/K+ ATPases are localised to the nodes of Ranvier

12. True or false: dendrites contain ribosomes and mRNA, suggesting some protein synthesis occurs in them?

  • Yep, nope, well maybe, I don't really have a clue what's going on...
  • True
  • Pass
  • False

13. Which of the following is a disadvantage of oligodendrocytes?

  • The Na+/K+ pump is only found at nodes of Ranvier
  • A disease process that affects one oligodendrocyte will affect up to 50 axons, meaning the consequences on the CNS can be huge
  • The conduction velocity can be ~10x faster
  • Oligodendrocytes are too metabolically efficient

14. Which cells myelinate the CNS?

  • Astrocytes
  • Oligodendrocytes
  • Microglia
  • Schwann cells

15. The signal processing centre is found in which of the following?

  • Axon
  • Microglia
  • Soma
  • Dendrites

16. What system does the enteric NS innervate?

  • Renal system
  • Respiratory system
  • GI system
  • Cardiovascular system

17. What makes up the PNS?

  • Sensory, motor & enteric nervous systems
  • Brain & spinal cord
  • Somatic, autonomic & enteric nervous systems
  • Parasympathetic, sympathetic & enteric nervous systems

18. Which of the following statements about axo-somatic synapses is true?

  • They're normally explosive
  • They're normally inhibitory
  • They're normally excitatory
  • They're normally implosive

19. What makes up the CNS?

  • Sensory, motor & enteric nervous systems
  • Somatic, autonomic & enteric nervous systems
  • Brain & spinal cord
  • Parasympathetic, sympathetic & enteric nervous systems

20. How many Schwann cells form each inter-nodal segment between two nodes of ranvier?

  • One
  • Four
  • Two
  • Three