130509 - The Chemical Senses

130509 - The Chemical Senses - The Chemical Senses...

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Unformatted text preview: The Chemical Senses Psychology Lecture 13/05/09 Smell Common chemical sense Vomeronasal Taste Taste and Smell are gatekeepers- Detect stimuli are on the verge of being assimilated by the body.- Roles: o 1) identify things that the body *** Reaction Stimulus: usually airborne molecules or vapours.- Substances must therefore be volatile but there is still no good way to describe odours. Do these chemicals have to be airborne- If so you wouldnt be able to smell substance suspended in liquid. o E.g. Webers upside down experiment- No. They can be suspended in fluid but they must be repellent to water.- Fish can use scent trails in water.- You inhale through both your nose and mouth- Ultimate at the ultimate rate of 30L/min- Smell based on reality of sensitivity in the atmosphere When inhaling- Olfactory Epithelium o Receptors o Covered in mucus o Approx 5cm^2 o Smells must be faceable o Contains hair cells o Cilia project into the mucus Sweep chemicals in and take them into the cell via the...
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This note was uploaded on 04/13/2011 for the course PSYC 1101 taught by Professor Mannen during the Spring '11 term at Texas Brownsville.

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130509 - The Chemical Senses - The Chemical Senses...

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