Gustatory & Olfactory Systems - Martin Flashcards Preview

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Flashcards in Gustatory & Olfactory Systems - Martin Deck (15):
1

What are taste cells and what do they mature from?

Polarized epithelial cells that arise from basal cells

2

What do G-protein coupled receptors let you taste?

Sweet, umami and bitter

3

What do transient receptor potential channels let you taste?

Saltiness and sour

4

Type 1 glial like cells

Do not have action potentials or afferent nerve connections

5

Type 2 receptor cells

Act by secreting ATP that may bind and excited Type 3 and may bind afferent nerves (bitter, sweet, umami)

6

Type 3 presynpatic cell

Form synapses on afferent nerve fibers

7

What is the pathway for processing taste?

Taste buds → solitary nucleus of brainstem → VPM of thalamus → insula and frontal cortex

8

Dysgueusia and ageusia

Distortion of and loss of taste

9

Leptin

Acts on taste receptors to reduce sweet response

10

GLP-1

Stimulated sweet receptors → increase insulin release

11

Where do olfactory receptor cells terminate?

Glomeruli in the olfactory bulb

12

On what chromosome are the majority of olfactory receptor proteins found?

11

13

What does activation of the pyriform cortex do?

Leads to rapid habituation

14

What does activation of the oribtofrontal cortex do?

Gradual habituation

15

What does the sub ventricular zone generate?

New olfactory neurons