Taste & Smell Flashcards
1
Q
Sour
A
- derived from pH
- receptors are H+ ion channels
2
Q
Salty
A
- derived from [Na+]
- receptors are Na+ ion channels
3
Q
Bitter
A
-derived from toxins
4
Q
Sweet
A
- derived from carbohydrate content
- via G protein coupled receptors
5
Q
Umami
A
- derived from protein content
- via G protein coupled receptors
6
Q
Vagus nerve innervates taste buds on what structure?
A
-epiglottis
7
Q
Filliform Papillae
A
-non-taste receptors on tongue that sense tactile sensation only
8
Q
Fungiform Papillae
A
- anterior tongue
- receive facial nerve innervation via chorda tympani
9
Q
Foliate Papillae
A
-on the sides of tongue
10
Q
Circumvallate Papillae
A
- posterior tongue
- receive innervation from glossopharyngeal nerve
11
Q
Depolarization of an olfactory neuron will which ions to flow OUT of the cell?
A
- chloride
- G-protein binding = increased cGMP (via activation of adenylyl cyclase) = Ca and Na enter cell = Ca gated chloride channels OPEN = CHLORIDE FLOWS OUT OF THE CELL, further depolarizing it = cell is driven to threshold and an action potential is fired.
