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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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?
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