Transcript Special Senses: Taste & Smell

SPECIAL SENSES:
TASTE & SMELL
Olfaction - Smell
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Chemoreceptors in roof of nasal cavity
 Cells
with long cilia
 Chemicals must be
dissolved in mucus
for detection
Olfaction - Smell


Detected smells
are relayed to the
olfactory bulb and
transmitted via
the olfactory
nerve.
Smells are
interpreted by the
olfactory cortex
Taste

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
Papillae
Taste buds
Gustatory hairs (long microvilli)
Taste


Chemicals dissolve in saliva
Gustatory hairs detect & relay message to
brain
Taste Receptors

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
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
Sweet receptors
 Sugars
 Some amino acids
Sour receptors
 Acids
Bitter receptors
 Alkaloids
Salty receptors
 Metal ions
Umami
 Glutamate
Other Tastes?