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Natural Science - Year I

Unit 23: Vesalius and Physiology

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Lab: Dissection of a Frog (or other Specimen)

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Natural Science Unit 23 Laboratory Activity: Sensory Perception

Goal: To measure the location of taste sensors in the tongue

Materials and Equipment:

  1. Toothpicks or Cotton Swabs
  2. Vinegar -- sour
  3. Salt
  4. Sugar
  5. Grapefruit or orange rind (the white stuff) -- bitter
  6. Water
  7. A partner
  8. Blindfold
  9. "Map" of the tongue


If you have time, repeat the experiment but use cotton filters to block the sense of smell. Note whether the ability to distinguish tastes changes.


After describing your procedure, summarize your results as much as possible.