P&C TB10 Lecture 2

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

1. What is the vibrational theory of odor receptors?

  • 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
  • Whether a odorant smells the same or different to another is based on its IR vibrational spectrum
  • Molecules might have to be the right shape to ‘dock’ with receptor sites but then bond energies determine the final activation level
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Other questions in this quiz

2. What is the McClintock effect?

  • Women are attracted to men with complementary immunity
  • Humans have a functioning VNO, which affected mate choice based on pheromones
  • Women living together will synchronise their menstrual cycles due to a pheromone found in sweat
  • Women do not synchronise their menstrual cycles

3. What is the role of turbinates?

  • To stop the flow of air to allow time for olfactory receptors to detect oderants
  • To move mucus
  • To break up the flow of air and force it against the olfactory epithelium
  • To force air into the lungs

4. How many receptor sites need to be binded to, in order for the OSN to fire?

  • 12
  • 10
  • 8
  • 19

5. Why is memory for smells so strong?

  • Because connections between the olfactory bulb and hippocampus are much faster (axons are highly myelinated)
  • Because cells in the olfactory bulb project directly to other sensory areas (somatosensory cortex, primary auditory cortex, primary visual cortex)
  • Because cells in the olfactory bulb project directly to areas associated with control, emotion and memory (piriform cortex, amygdala, hippocampus)
  • Because there are more connections between the olfactory bulb and hippocampus

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