Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Foundations of Neuroscience > Chemical senses > Flashcards

Chemical senses Flashcards

1
Q

What are the functions of chemical senses?

A

Finding food
Finding a mate
Avoiding dangerous substances
Homeostasis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What are the receptors of chemical senses?

A

Chemoreceptors

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What are the human chemical senses?

A

Taste (gustation)

Smell (olfaction)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What are the 5 basic tastes?

A 
Salt
Sour
Sweet
Bitter
Umami
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Where are the taste cells?

A

Tongue
Palate
Pharynx

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What is the structural organisation of taste cells?

A 
Papilla
Taste buds
Pore
Basal cells
Taste cells
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is the lifespan of taste receptor cells?

A

2 weeks

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What are the stages from stimulus to action potential in a taste cell?

A 
Chemical behinds
Receptor potential
Depolarisation
Voltage gated Ca2+
Calcium entry
Neurotransmitter released
Excites sensory neurone
Action potential
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

How is salt detected?

A

Sodium entry via non-gated channels

Results in depolarisation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

How are sour tastes detected?

A

H+ entry via TRP
Blocks the K+ channel
Results in depolarisation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

How are sweet, umami, bitter tastes detected ?

A

G protein coupled receptors

T1R and T2R families

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Which nerves transmit taste?

A

VII
IX
X

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Where does the signal go after the cranial nerves?

A

To the gustatory nucleus

Then the gustatory cortex

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What is ageusia?

A

Inability to taste

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is neural coding of taste?

A

Comparing all pathways

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What are the secondary pathways of taste?

A

Swallowing and salivation

17
Q

What is more sensitive taste or smell?

A

Smell

18
Q

What is the combination of taste and smell?

A

Flavour

19
Q

Where are smell receptors?

A

Olfactory epithelium

20
Q

Describe olfactory cells?

A

Olfactory cells are neurones
Replaced every 4-8 weeks
Each cell is one type of receptor molecule
Each receptor molecule binds a range of odorants

21
Q

What is population coding?

A

Co-ordinated firing of multiple neurones

22
Q

How are action potentials triggered in olfactory cells?

A 
Odorant binds to receptor
G protein mediated events
Intracellular cascade
Na+/Ca2+ channels open
Depolarisation
Receptor potential
Action potential
23
Q

Which cranial nerve carries olfactory signals?

A

I

24
Q

What is the olfactory pathway?

A

Olfactory neurons
Olfactory bulb
Olfactory cortex
Recognition/association in the orbitofrontal cortex

Foundations of Neuroscience (15 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions