Term
| What are the elementary qualities of taste? |
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Definition
1) Salty (NaCl)
2) Sweet (sucrose
3) Sour (HCl)
4) Bitter (quinine) |
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Term
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Definition
A) Bitter
B) Sour
C) Salty
D) Sweet |
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Term
| What are the 3 kinds of papillae bumps where taste buds are found? |
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Definition
1) Circumvallate
2) Foliate
3) Fungiform |
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Term
| Which nerves supply the tongue sensation? |
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Definition
1) The corda tympani (a branch of VII)
2) The glossopharyngeal (IX |
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Term
| How do molecules signalling bitterness and sweetness act? |
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Definition
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Term
| How do molecules signalling sourness and saltiness act? |
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Definition
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Term
| Describe the taste pathway |
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Definition
Taste afferents- Gustatory portion of the solitary nucleus- VPM nucleus of the thalamus- primary taste cortex (in the parietal lobe)
- Ipsilateral pathway |
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Term
| Describe the smell pathway |
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Definition
Olfactory receptor axons- mitral cells (in the olfactory bulb)- primary smell cortex in the temporal lobe (travels through the olfactory tract)
- Ipsilateral pathway |
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Term
| What is the most important difference between smell and other senses? |
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Definition
| Smell bypasses the thalamus |
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Term
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Definition
| By olfactory chemoreceptor cells in the olfactory mucosa |
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Term
| What elemental odour qualities are encoded? |
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Definition
1) Floral
2) Ethereal (pears)
3) Musky
4) Camphor (eucalyptos)
5) Putrid
6) Pungent |
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Term
| What is the mechanism of smell transduction? |
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Definition
| A g protein inducing a cascade of second messengers which regulate ion channels |
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