Quiz 1: Somatosensory (back to notes) 
 Be sure to not only answer the questions but rank them from most appropriate and well written to least appropriate and/or badly written.  In the section where you choose one of two questions only rank the one that you've chosen.  In total you should have 10 questions that you rank.
  1. Receptors found only in galbrous skin:

    2. a) Ruffini endings
    b) Meissner Corpuscles
    c) Pucinian Corpuscles
    d) Merkels disks
    e) Free nerve endings
  2. T or F Receptors with large receptive fields are located close to the outside surface of the epidermis?
  3. Of the four types of sensory axons, which carry information about sharp pain, and which carry information about dull, throbbing pain?
  4. Which of the following statements is false?

    5. a) When touching boiling water the pain sensation is mediated by A-C fibers.
    b) A constant painful feeling after touching boiling water is mediated by  A-delta fibers.
    c) The pain sensation of boiling water is mediated by  A-delta fibers.
  5. C fibers are associated with:

    6. a) Pucinian chemical receptors
    b) 'hot' receptors
    c) 'cold' receptors
    d) mechanoreceptors
    e) a & b
    f) all of the above
  6. Describe the pathway taken by pain and temperature information.  Start at the receptor and end in the neocortex.  Specify where this information synapses and whether the tracts it travels in are   ipsilateral or contralateral from the area of entry into the CNS.
  7. What is a sensory pathway?
  8. How does the Pacinian corpuscle maintain its extremely rapid adaptor response?
Choose 1
  1. What does it mean that a receptor cell is slowly adapting?
  2. Is the surface area of the body represented in a distorted fashion in the neocortex?  Explain.
Short essay. (1 page)
  1. What explanation would you give for the following scenario.  One day Janet was cooking and  there was a phone call.  The call was from her sister who reported the news that their mother had been in an accident.  This news caused Janet to stop cooking and turn away from the stove.  After a few seconds she smelled a grotesques odor of burning flesh.  When she turned toward the stove she noticed that the smell was due to her hand being  on top of the burner.

    2.  Be as precise as possible in your explanation.  If the person were available for questioning are there any questions that could be asked that might confirm or disprove your hypothesis.