What are the receptors for taste and smell?
In general, how do poisons taste and smell?
to encourage you not to ingest it
Acids taste SOUR
Toxins taste BITTER
What are the sensory organs of taste?
What are the chemoreceptors found in taste buds?
Taste receptor cells
Taste receptor cells have a short life span of ___ days.
Which type of nerve fibres are found in the sensory receptor cells of the taste buds?
Where are the taste buds found?
Which tongue papillae have taste buds?
Fungiform (anterior), vallate (border) and foliate (fringes)
Filiform (middle) DO NOT
Which cranial nerve supplies taste for the
Chorda tympani branch of CN VII
What change in potential does the binding of chemicals to taste buds cause?
Which nerve fibres are action potentials transferred to in the taste buds?
Which cranial nerve supplies the taste buds of the epiglottis and pharynx?
Which chemical causes a salty taste?
Sodium chloride (NaCl)
Which ions cause a sour taste?
Which chemical causes a sweet taste?
What broad group of chemicals cause a bitter taste?
What is ageusia?
Loss of taste
What is hypogeusia?
What is dysgeusia?
What is gustation?
What is olfaction?
Sense of smell
What mucosa of the nasal cavity is important in the sense of smell?
Which cells in the olfactory mucosa act as chemoreceptors?
What kind of nerve fibres do they contain?
Olfactory receptor cells
From which structures of the olfactory neurons do cilia project outwards?
Where do odorants bind?
Which cells act as precursors for new olfactory receptor cells?
Through which structure do the olfactory nerves pass into the anterior cranial fossa?
Cribriform plate of ethmoid bone
Which structures do the olfactory nerves become when they pass through the cribriform plate?
Which lobe contains the olfactory centre of the brain?
What act enhances the sense of smell by forcing odorants upwards onto the olfactory mucosa?