Chemoreception - Taste Flashcards
Where do you find chemoreceptors for taste?
In taste buds
What is a taste pore?
It is a small opening in a taste bud where the fluids in the mouth come into contact with receptor cells
Name the 3 types of lingual papillae
- filiform papillae
- fungiform papillae
- circumvallate papillae
Which of the 3 lingual papillae do not contain taste buds?
Filiform papillae
How many taste buds to fungiform papillae contain?
5 taste buds each
How many taste buds to circumvallate papillae contain?
100 taste buds each
What evokes the sensation of taste?
Receptor cells coming into contact with chemicals in what you are eating
The binding of a tastant with a receptor cell will produce?
A depolarising receptor potential due to the ionic Change
How are taste bud components constantly renewed?
From epithelial cells around it which differentiate into supporting cells and then into receptor cells
Where are sensory inputs sent to?
- conveyed to the brain stem
- sent to the thalamus at the cortical gustatory area
- sent to the hypothalamus and limbic systems
Which cranial nerves synapse with taste buds?
- VII
- IX
- X
Name the five primary tastes
- salty
- sour
- sweet
- bitter
- umami
Name 2 types of taste cells based on their response to stimuli
- type III or presynaptic cells
- type II or receptor cells
Which taste cells detect salty and sour tastes?
Type III or presynaptic cells
Which taste cells detect sweet,bitter and umami tastes?
Type II or Receptor cells
