Physiology: Smell and Taste Flashcards
what receptors are stimulated in the nose and mouth to create smell and taste?
chemoreceptors
where are the sensory receptors of taste found?
packaged into taste buds
what is the sense organ of taste?
the taste bud
what is the life span of a taste receptor cell and what happens after this?
around 10 days
replaced from basal cells within the taste buds
where are taste buds mainly found?
the tongue - in the papillae
what are the four types of papillae?
filiform
fungiform
vallate
foliate
what is the most common papillae?
filiform
what do filiform papillae not contain?
taste buds
what is another name for a taste provoking chemical?
a tastant
what happens when a tastant binds to a taste receptor cell?
produces a depolarising receptor potential
initiates AP’s, conveyed to the brain
what area in the brain is information about taste sent to?
cortical gustatory areas
what three nerves are important in conveying taste to the brain?
CN VII
CN IX
CN X
what are the five primary tastes?
bitter sour salty sweet umami
what is ageusia?
loss of taste
what is hypogeusia?
reduced taste function
