Appetite And Taste Flashcards
Which receptors recognise taste and smell? What are the functions of this?
Chemoreceptors
Recognise kin, stimulate digestive juices and affect appetie (quality control)
What epithelium lines the tongue?
Stratified squamous
The tongue has papillae on them. They vary in density in each species. What are the mechanical papillae?
Filiform
Conical
Lenticular
What are the types of gustatory papillae? (Contain taste buds)
Vallate
Fungiform
Foliage
What are in taste buds?
Taste receptor cells
Neuroepithelial cells
Stem cells
Taste pore
What happens in the taste pore?
Saliva dissolved tastants (chemicals that stimulate taste receptor cells) bind
Different action patterns are fired depending on the taste of food. What are the 5 groups?
Sweet Sour Bitter Salty Umami
What is the gustatory nerve pathway?
Facial, glossopharyngeal and vagus nerve
Limbic system (hypothalamus)
Frontal lobe
What is the purpose of olfaction?
Detect pheromones
Trigger physiological/behavioural responses
What does the olfactory epithelium contain?
Olfactory receptor cells with cilia
Mucous glands
Supporting cells
Basal cells
What stimulates an impulse to the olfactory cranial nerve?
The binding of scent to an olfactory receptor cell
What is the vomeronasal organs? Which species do not have it?
Paired accessory olfactory organ in nasal septum
Communicates with oral cavity via incisive duct
Humans, aquatic vertebraes, birds
What type of epithelium is found in vomeronasal organ?
Olfactory epithelium with MICROVILLI not cilia
What is the Flehmen reflex? What does this do?
When animals left upper lip to expose teeth and inhale
Stimulate the vomeronasal cavity by moving fluid there
Where is appetite controlled?
Hypothalamus
