Gustation Flashcards
Where are the sensory receptors for a taste located primarily
On the taste buds on the surface of the tongue
Taste buds are located inside
Papillae
Taste buds comprise 50 to 150
Taste cells and support and basal cells
What is the taste pore
Where the molecule would go in
Each T cell is sensitive to only one taste list the five type of receptors
Sweet umami better salty and sour
What tastes are Ionotropic receptors
Salty and sour
What tastes are metabotropic receptors
Sweet better and umami
What is known about the salty mechanism
Not too much is known other than that sodium moves in and hydrogen is probably involved
What are the type one cells and their function
They may sense salt, they are the primary support cells
What are the type to cells and their function
They are the receptor cells for sweet umami bitter and are G coupled receptors
What are type three cells
They are salty or sweet and they will release serotonin and ATP onto the primary gustatory neurons
Can ATP act on the primary gustatory neurons?
Yes because it’s considered a neurotransmitter too salty bitter and sweet
True or false? Calcium can be stored inside the cell in sweet, umami or bitter receptors
True
Describe pathway from activation of the taste cell to action potential sent to the brain
1) ligands activate the taste cell
2) various intracellular pathways are activated
3) Ca2+ signal in the cytoplasm exocytosis or ATP formation
4) NT or ATP is released
5) primary sensory neutron fires and AP are sent to the brain
Primary sensory neurons have axons that collide to form cranial nerve ?
7 = facial 9 = glossopharyngeal (tongue) 10 = vagus (everything)
