Q:

The olfactory system can detect

safaTerkawi
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2022-08-10
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The olfactory system can detect.

  1. 20–40 distinct odours.
  2. Differences in odour between isomers of the same substance.
  3. The direction from which an odour comes.
  4. Small differences in the concentration of the substance responsible for the odour.
  5. Odours better in old than in young people.
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safaTerkawi
2022-08-10
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A. False It is thought that humans can differentiate between 2000 and 4000 different odours. B. True The receptors can detect small differences in molecular configuration.

C. True Probably due to the different time of arrival of the odour at the two nostrils.

D. False Though very low concentrations of odorous substances can be detected, differences in concentration of more than 30 per cent are needed to detect a difference in intensity.

E. False Olfaction ability falls with age

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