Taste/Olfaction Flashcards
What is sour tasting
hydrogen ion
what is salty tasting
ionized salts
what is sweet tasting
not caused by any 1 class ex) glycols, alcohols, amino acids
what is bitter tasting
organic substances like alkaloids,
what is umami tasting
monosodium glutamate, othe ramino acids
what is the tip of the tongue most sensitive to
sweet, umami and salty
what are the sides and back of the tongue most sensitive to
sour and bitter
what happens i fyou stimulate the bitter receptors at the back of the tongue
protrustion or tongue, gagging
what is the typical life span of taste buds
10 days to 2 weeks
what kind of mutation affects the ability to taste certain bitter substances
mutation in both copies of T2R gene
what provides taste to the anterior 2/3 of the tongue
CN VII (chorda tympani)
what provides taste to the posterior 1/3 of the tongue
CN IX
what innervates the soft palate
CN VII (geater superifical pertrosal branch)
what innervates the epiglottis and esophagus
CN X
do the transduction of acids and Na+ salt stimuli requrie receptors
no. need specific types of ion channels
