Sensory Pathways

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1. Where are receptor fields smallest?

  • Where the surface area of the skin is smal
  • Where the surface area of the skin is large
  • Where the most discrimination is required
  • Where the least discrimination is required
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2. Brodmann's areas 1 and 3b recieve information from where?

  • Skin receptors
  • Muscle receptors
  • Joint receptors

3. What effect does an increase in intensity have on action potentials?

  • It increases the intensity of the action potential itself
  • It increases the frequency of the action potentials
  • It increases duration of the action potentials
  • It has no effect

4. Which of the following do mechanoreceptors and chemorecptors have in common?

  • The stimulus is the binding of a molecule
  • The ion channel is also the receptor
  • When unstimulated, the ion channel is closed
  • The stimulus acts directly on the ion channel

5. What information does the dorsal column system NOT convey?

  • Proprioception
  • Pain
  • Fine (discriminative) touch
  • Vibration

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