Special Senses Flashcards
Special Senses
Olfactory (smell), Gustatory (taste), Hearing and Equilibrium, Sight
Sense of Smell
Odor, Receptor Cell, Olfactory Bulb, Olfactory Tract, Limbic System
Taste Sensations
Sweet, Sour, Bitter, Salty, Savory (Umami)
Umami
A savory taste, is one of the five basic tastes, together with sweet, sour, bitter, and salty. A loanword from the Japanese umami can be translated “pleasant savory taste”
Outer Ear
Auricle, Auditory Canal
Auricle
Collects sound waves
Auditory Canal
Filter air, funnels sound
Middle Ear
Eardrum, Auditory Ossicles, Auditory (eustachian) Tube, Tympanic Cavity
Auditory Ossicles
Malleus, Incus, Stapes
Transmit vibrations and amplifies sound
Auditory (eustachian) Tube
Equalize air pressure (connection of middle and throat)
Tympanic Cavity
Transmit sound
Inner Ear (Labyrinth)
Semicircular Canals, Cochlea, Organ of Corti, Vestibulocochlear Nerve, Round Window
Semicircular Canals
Helps with equilibrium
Cochlea
Hearing - Turn vibrations into electrical impulses
Organ of Corti
Hairlike receptors that vibrate as sound hits them
Vestibulocochlear Nerve
Sends hearing and balance info to brain
Round Window
Decompressed vibration energy in the cochlea
How hearing works
- Sound waves enter the external auditory canal
- Eardrum vibrates
- Auditory ossicles (malleus, incus, stapes) amplify vibrations
- Stapes hit the oval window and transmit vibrations to the cochlea
- Organs of Corti contain receptor cells (hair cells) that deform from vibrations
- Round window dissipates vibrations within the cochlea
We lose hearing when fibers of hair cells inside the cochlea are damaged by loud noises