How many distinct chemoreceptors are there on the tongue?
5
4 of 24
Supertasters show?
Different genes for chemical receptors, and a different number of taste buds
5 of 24
Is the taste sensory cortex lateralised?
Yes
6 of 24
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
7 of 24
What 2 things CAN you smell?
Menthol and isobutylmethoxypyrazine
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What 2 things CAN'T you smell?
Methane and carbon monoxdie
9 of 24
At what concentration is butyl mercaptan detectable at?
10 ppb
10 of 24
What is the role of turbinates?
To break up the flow of air and force it against the olfactory epithelium
11 of 24
What is the cycle time of the nose (during which different nostrils have different flow rates and smell different things)?
3 hours
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How many receptor sites need to be binded to, in order for the OSN to fire?
8
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Each glomerulus in the olfactory blub receives input from...
OSNs expressing the same surface receptor
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What is the shape 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
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What is the vibrational theory of odor receptors?
Whether a odorant smells the same or different to another is based on its IR vibrational spectrum
16 of 24
What is the swipecard model of odor receptors?
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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Why is memory for smells so strong?
Because cells in the olfactory bulb project directly to areas associated with control, emotion and memory (piriform cortex, amygdala, hippocampus)
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What were the results of Cain (1982)?
Women performed better overall identifying scents, but men performed better for scents in the 'male domain'
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Did females NOT on the pill prefer males with similar or different HLAs?
Different
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Female are more aroused around a male experimenter if a subthreshold concentration of what is presented?
Androstadienone
21 of 24
True or false, the thalamus shows reliable activity even to odors below threshold?
True
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What did Gelstein et al. find?
Men could not consciously tell tears from salt water, but rated women as less attractive, lower levels of sexual arousal, lower levels of testosterone, and reduced brain activity in substrates of sexual arousal
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What is the McClintock effect?
Women living together will synchronise their menstrual cycles due to a pheromone found in sweat
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Other cards in this set
Card 2
Front
At what concentration is Bitrex detectable at?
Back
10 ppm
Card 3
Front
Taste receptors are located where?
Back
Card 4
Front
How many distinct chemoreceptors are there on the tongue?
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