P&C TB10 Lecture 2

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  • Created by: May2714
  • Created on: 24-05-16 12:59

1. What is it that causes the experience of chilli peppers as hot?

  • Receptors on the cell stimulated by physical heat are also stimulated by chilli heat
  • Chilli peppers increase body temperature
  • Chilli peppers reduce the activity of receptors on the cell that are stimulated by cold
  • Know one knows why
1 of 20

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2. What is the shape theory of odor receptors?

  • Whether a odorant smells the same or different to another is based on its IR vibrational spectrum
  • Lock and key theory - whether an odorant molecule smells the same or different to another is based on whether it has a complementary shape to the receptor binding site of the OSN
  • Molecules might have to be the right shape to ‘dock’ with receptor sites but then bond energies determine the final activation level

3. How many basic tastes are there?

  • 5
  • 4
  • 6
  • 11

4. Taste receptors are located where?

  • On the epiglottis
  • In the pits of papilla
  • On the surface of the tongue
  • In the nose

5. At what concentration is butyl mercaptan detectable at?

  • 10 ppb
  • 100 ppm
  • 10 ppm
  • 100 ppb
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