Taste Flashcards
taste buds
sensory receptors
shape of taste buds
oval structures embedded in epithelium of tongue
3 cells of taste buds
taste cells (most)
basal
supporting
taste cells
have microvili (hairs) that extend through pores
exposed and replaced continuously
normal life span 10 days
tastants
substances that dissolve in saliva and stimulate taste cells
papillae
bumps on tongue
filiform papillae
filament shaped
most numerous
NO TASTE BUDS
allow food to be manipulated more easily
Vallate papillae
largest but LEAST NUMEROUS
8-10 in a V between posterior and anterior part of tongue
have taste buds
Foliate papillae
leaf shaped
in folds on sides of tongue
most sensitive taste buds
decreases with age
Fungiform
mushroom shaped
scattered over anterior surface of tongue
small red dots
have taste buds
Taste cells Do or do not have axons
do NOT
short connection with sensory neurons
APs created by Taste cells
NTs are released by taste cells that stimulate APs on the sensory neurons
sour
most sensitive receptors on later aspect of tongue
hydrogen ions cause depolarization
Salty
most sensitive receptor on tip of tongue
LOWEST sensitivity with sweet
Na diffuses through Na channels for depol and metal ions
bitter
posterior aspect of tongue
MOST SENSITVE
alkaloids that are toxic
g protein complex
