Taste (Gustation) Flashcards
What is it called when detection of tastant molecules dissolved in saliva by chemoreceptors associated with taste buds located on the surface of the tongue and the soft palate?
Gustation
Taste buds are housed in elevations called?
papillae
What type of papillae distributed over anterior 2/3 of tongue and has no taste buds and function only in manipulation of food during mastication?
Filiform papillae
What type of papillae is located at tip & sides of tongue and each houses a few taste buds?
Fungiform papillae
What type of papillae houses in ridges on posterior, lateral tongue and during childhood, each houses only a few taste buds?
Foliate papillae
What type of papillae has the fewest (only 10-12); make inverted V at back of tongue and house majority of the taste buds?
Vallate papillae (aka circumvallate
What contains
Gustatory epithelial cells that feature-
-Gustatory villus (taste hair) with chemoreceptors that project into a taste pore
-Supporting cells
Stem cells called basal cells
-Mitosis of basal cells replaces gustatory cells every 7-9 days?
Taste buds
What taste sensations have alkaloids and
amino acids?
Bitter - alkaloids
Umami – amino acids
What taste sensation has sugars and acids?
Sweet - sugars
Sour - acids
What taste sensation has ions?
Salty - ions
Sensory impulses from taste buds of anterior 2/3 of tongue are transmitted to CNS via what CN?
CN VII, Facial
Sensory impulses from taste buds of posterior 1/3 of tongue are transmitted to CNS on what CN?
CN IX, Glossopharyngeal
Sensory impulses from taste buds associated with epiglottis and pharynx are transmitted to CNS on what CN?
CN X, Vagus
Fibers from taste buds synapse with neurons in the?
Those neurons synapse with others in the?
medulla oblongata
Thalamus
Thalamic fibers project to?
gustatory cortex within the insula
