Chemosensory Fnxn: Smell and Taste

Question 0

Population Coding

Answer 0

Patterned response of the entire population of receptors; makes response to specific odorants reproducible

Question 1

Adaptation of Olfactory Neurons

Answer 1

Ca2+ enters and is bound by CaM; makes it less effective at opening Cl- channels

Question 2

Olfactory bulb processing

Answer 2

Organizes chemosensory input into broad categories; higher processing in entorhinal cortex

Question 3

Salt/Sour taste transduction

Answer 3

Both ionotropic

Salt: Na+ flows thru ENaC channels depolarizing cell & activating Ca2+ channels

Sour: H+ flows thru TRP channels depolarizing cell & activating Ca2+ channels

Question 4

Sweet/Bitter/Umami Taste Transduction

Answer 4

Tastant binds to G-protein coupled receptor which then activates PLC

=>Increased IP3 opening Ca2+ membrane channels and ER Ca2+ channels

Question 5

Glomeruli

Answer 5

Spherical structures where olfactory neurons synapse at

*each glomeruli receives axons from only ONE receptor neuron