Create an account
Olfactory & gustatory impulses travel not only to the ________________, but also the _______________
Cerebral cortex; limbic system
Define: Limbic system
A complex system of nerves and networks in the brain that controls the basic emotions and drives
The olfactory epithelium is located in the ____________.
Superior part of the nasal cavity
(surface of the cribriform plate & extending along the superior nasal concha)
Olfactory epithelium = 3 types of cells
1. Olfactory receptor
2. Supporting columnar epithelial cells
3. Basal cells
Olfactory receptor is a _________ neuron with ___________ (olfactory hairs). These receptors respond to _________ molecules
bipolar; cilia; odorant
Basal cells are ______ cells that replace olfactory _______ (replaced ________ly)
Stem; receptors; month
Olfactory cascade of events (5 steps)
Odorant binds → G-protein & cAMP produced & released → opening of Na+ channels → Inflow of Na+ → Action potentials
Pathway of olfactory nerve impulses
2 olfactory nerves → olfactory bulbs → olfactory tract → Cortex's PRIMARY OLFACTORY AREA (temporal lobe)
Olfaction is the only sensory system that has _________ cortical projections. Does not go through the ________ (relay station)
Parasympathetic motor innervation to _______ glands & the ___________ in the nasal cavity is provided by the CN _______ or ______ nerve.
lacrimal; mucous membrane; VII; facial
The taste buds are located on the _________, _________, ___________ & ___________
Tongue; soft palate; pharynx; larynx
_______ cells located near the CT base _______ and differentiate, first becoming _____ cells, then ______ _______ cells inside the taste buds.
Basal; multiply; supporting; gustatory receptor
Each gustatory receptor cell has a single, long ______, called a ___________ hair, which projects through the ________.
microvillus; gustatory; taste pre
4 different types of papillae:
1. Vallate papillae
2. Fungiform papillae
3. Foliate papillae
4. Filiform papillae
Vallate papillae: amt, size, formation, found where, # taste buds each?
12; Very large; form a row; back of the tongue; 100-300
Foliate papillae: found where? Last how long?
Small trenches on the lateral margins of the tongue; most degenerate in early childhood
Please allow access to your computer’s microphone to use Voice Recording.
Having trouble? Click here for help.
We can’t access your microphone!
Click the icon above to update your browser permissions and try again
Reload the page to try again!Reload
Press Cmd-0 to reset your zoom
Press Ctrl-0 to reset your zoom
It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.
Please upgrade Flash or install Chrome
to use Voice Recording.
For more help, see our troubleshooting page.
Your microphone is muted
For help fixing this issue, see this FAQ.
Star this term
You can study starred terms together