chemical senses - gustation

Question 0

taste bud

Answer 0

clump of 50-150 receptor cells located on the PAPILLAE

Question 1

one trial learning that can last a life time?

Answer 1

conditioned taste aversion

Question 2

responsible for signalling the spiciness of foods of ‘coolness’

Answer 2

free nerve endings

Question 3

selectivity in gustation

Answer 3

very strong tuning

receptor cell types fire with particular substances (sour, sweet, bitter, salty, ?umami)

Question 4

taste primaries

Answer 4

each ‘channel’ signals its own property alone.

Question 5

cross-fibre theory

Answer 5

population coding.

taste signalled by the overall pattern of firing over 4 channels (sour, sweet, salty, bitter)

Question 6

gustatory transduction

Answer 6

molecules dissolve in saliva and bind with receptors

• > gustatory nerve axons TERMINATE in the brainstem
• > projection from brainstem travel to the cortex via the thalamus and the amygdala

Question 7

henning’s taste tetrahedron

Answer 7

doesn’t include umami

Question 8

gustatory adaptation

Answer 8

exposure to a taste can affect the perception of a later taste

Question 9

flavour

Answer 9

not the same as taste it is MULTISENSORY

processed in the orbitofrontal cortex a MULTIMODAL BRAIN AREA