Smell and taste Flashcards
How is the pattern of airflow different in sniffing?
Sniffing brings the air further back into the nasal cavity so it reaches the olfactory epithelium
How is the olfactory organ structure adapted in dogs?
- Anterior mucosa richly vascularised
- Turbinate bones coated with epithelium for gases to dissolve in - large SA in dogs
- Rhinencephalon enlarged
Name the part of the brain involved with smell
Rhinencephalon
How do humans utilise a dogs sense of smell?
- Rescue duties; all over the world.
- Watch dogs
- Sniffing out drugs and explosives
What % of the genome is olfactory receptors?
2%
Describe the olfactory secondary messenger pathway
- Odour molecules bind to a olfactory receptor
- A mitral cell (secondary messenger) receives input from olfactory cells
- They generate an action potential
Which cranial nerve carries the sense to the brainstem?
CN I
What are the primary afferents that enter the brain?
Neuroepithelial cells
What does the sensory information bypass on the way to the cortex?
The thalamus
Why system is perception part of?
Limbic
What does the CNI test involve?
Putting a strong smell under the animals nose and looking for a visible response
What organ detects pheromones?
Vomeronasal Organ
Why are pheromones important in reproduction?
- Mating calls and signals
- Maternal bonding with offspring
What are some characteristics of the Flehmen reaction - stimulates by vomeronasal organ?
- stretching of the head forward
- lifting upper lip
- wrinkling the nose
Where are taste buds located on the tongue?
Tongue papilla
