CNS & PNS Histology & Physiology - BM5 NLM1

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

  • They're normally inhibitory
  • They're normally implosive
  • They're normally excitatory
  • They're normally explosive
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Other questions in this quiz

2. In the peripheral nervous system, which cells form the myelin sheath?

  • Microglia
  • Satellite cells
  • Schwann cells
  • Oligodendrocytes

3. At resting membrane potential, which of the following is most likely to be true?

  • There is a high [K+] inside the neuron and a low [Na+] outside the neuron, but the resting neuronal membrane is less permeable to K+ than Na+
  • There is a high [K+] inside the neuron and a low [Na+] outside the neuron, but the resting neuronal membrane is more permeable to K+ than Na+
  • There is a high [K+] inside the neuron and a high [Na+] outside the neuron, but the resting neuronal membrane is more permeable to K+ than Na+
  • There is a high [K+] inside the neuron and a high [Na+] outside the neuron, but the resting neuronal membrane is less permeable to K+ than Na+

4. What is the role of astrocytes in the CNS?

  • Support the endothelial cells of the blood-brain barrier and participate in brain scarring
  • Myelination
  • Provide active immune defence
  • Secrete CSF

5. Which of the following statements about axo-dendritic cells are true?

  • They are the least common and are generally inhibitory
  • They are the most common and are generally excitatory
  • They are the most common and are generally inhibitory
  • They are the least common and are generally excitatory

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