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25 Cards in this Set

  • Front
  • Back
having a keen sense of smell that is important to their survival (animals)
having a less keen sense of smell that is not crucial to their survival (humans)
Detection Threshold
the lowest concentration at which an odorant can be detected.
Difference Threshold
smallest difference in the concentration of two odors that can be detected
Recognition Threshold
the concentration at which quality can be recognized.
dime-sized region located high in the nasal cavity that contains the receptors for olfaction. Located on the roof of the nasal cavity and just below the olfactory bulb.
Olfactory Mucosa
located in the mucosa. The cilia of these neurons contain the olfactory receptors.
Olfactory Sensory Neurons
a protein string that crosses the sensory neuron’s membrane seven times
olfactory receptors
a structure deep in the cortex that is involved in emotional responding
Recognition Profile
the pattern of firing of neurons that creates a smell perception
Combinatorial Code for Odor
– different odorants are coded by different combinations of olfactory receptors, but a particular olfactory receptor may participate in the code for many odorants.
shaped like cones and are found over the entire surface of the tongue, giving it its rough appearance.
Filiform Papillae
shaped like mushrooms and found at the tip and sides of the tongue
Fungiform Papillae
a series of folds along the back of the tongue on the sides
Foliate Papillae
spaded like flat mounds surrounded by a trench, found at the back of the tongue.
Circumvallate Papillae
Chorda Tympani Nerve
Nerve running from taste cells on the front and side of the tongue
Glossopharyngeal Nerve
Nerve running from the back of the tongue
Superficial Petronasal Nerve
Nerve running from the soft palette – the top of the mouth.
Site of flavor perception.
Orbital Frontal Cortex
Distributed Coding
Hypothesizes that quality is signaled by the pattern of activity distributed across many neurons.
Specificity Coding
Hypothesizes that quality is signaled by the activity in neurons that are tuned to respond to specific qualities.
Route by which the odor stimuli from the food reaches the olfactory mucosa.
Retronasal Route
The passage that connects the oral and nasal cavities.
Nasal Pharynx
Neurons that respond to more than one sense.
Bimodal Neurons
Overall impression that we experience from the combination of nasal and oral stimulation.