Chapter 7: GUSTATION Flashcards
1
Q
How many taste buds?
A
- approx 10000 in tongue, plate, pharynx, larynx
- most arranged around papillae
2
Q
How do cilia project gustatory info?
A
- located at the end of each cell
- project through opening of taste buds (the pore) into saliva that coats tongue
- Lifespan of 10 days
3
Q
How do you taste salt?
A
- salt receptors
- a substance must ionize
- receptor is a simple sodium channel
- sodium enters the taste cell and depolarizes it.
4
Q
How do you taste sour?
A
- response to hydrogen ions present in acidic solutions
- anions also have an effect
5
Q
How do you taste bitter, sweet and Umami?
A
- linked to G proteins
- Bitterness and Sweetness receptors may be similar
- Umami receptor is similar in structure to sweet receptors
6
Q
How is the gustatory info transmitted in the gustatory pathway?
A
- transmitted through cranial nerves
- diff flavours activates diff regions in the primary gustatory area of the insular cortex
- gus cortex also receives thermal, mechanical, visceral, and nociceptive stimuli: determines if you can eat the food without getting hurt
