Term
| What are they four special senses? |
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Definition
Thermoreceptors
Mechanoreceptors
Photoreceptors
Chemoreceptors |
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Term
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Definition
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Term
What is cutaneous sense?
Where is it? |
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Definition
In the epidermis
Touch receptors to temperature |
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Term
| What are mechnoreceptors? |
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Definition
physical deformation
touch in skin
hair cells in ear |
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Term
| What are the three touch receptors? |
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Definition
touch: meniscoid nerve endings
pain: free nerve endings
vibration: lamellar corpuscles |
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Term
| Where is the external ear located? |
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Definition
| extends from the exterior to the tympanic membrane (eardrum) |
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Term
What is the Auricle/Pinna?
What does it do? |
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Definition
Part of the ear visible on the outside of the head
acts as capturing device for air pressure waves |
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Term
Where is the middle ear located?
What does it contain?
What closes off the middle ear to the exterior ear? |
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Definition
air filled space within the temporal bone
contains the tympanic bulla/cavity lined by mucous membrane
closed to the external ear by the intact tympanic membrane and communicates with the nasopharynx via the auditory tube |
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Term
| What is the auditory tube? |
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Definition
opening of the auditory tube brought about by swallowing or yawning
permits equalization of air pressures between middle and external ears |
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Term
What are they three auditory ossicle bones?
What do all three of them do? |
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Definition
| Malleus (hammer) Incus (anvil) Stapes (stirrup) provides mechanical linkage from the eardrum to the oval window vibrations are transmitted from the former to the later |
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Term
| Where is the inner ear located? |
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Definition
| house entirely within the petrous temporal bone, forming an elaborate fluid-filled system of chambers and canals |
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Term
| What consists of the cochlea? (parts) |
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Definition
| contains the cochlear duct which houses the sensory receptors that respond to sound waves (hearing) |
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Term
What does the cochlea look like?
What is it divided into? |
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Definition
tapered tube that circles around itself
divided length wise into two fluid (perilymph) filled canals which are joined by tapered end |
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Term
| Where is the oval window located? |
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Definition
| located at the proximal aspect of the cochlea |
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Term
Where is the round window located?
What does it do? |
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Definition
at the distal end of the cochlea
allows the energy from sound waves to be dissipated into the tympanic cavity |
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Term
| What types of hair cells do what? Where are they located? |
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Definition
shortest hair cells detect the highest frequency, longest detect the lowest frequency
Organ of Corti |
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Term
| What fluid fills the bony labyrinth and the membranous labyrinth? |
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Definition
filled with perilymph
filled with endolymph |
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Term
| How does the ear transport vibrations? |
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Definition
ossicles transmit vibration to the cochlea through the oval window
causes "fluid" wave in the perilymph
vibrating perilymph causes the membranous walls of the cochlear duct to vibrate
organ of Corti, in cochlear duct, contains specialized hair cells that generate nerve impulse when displaced by the moviement of the endolymph |
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Term
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Definition
specific chemicals bind and generate an action potential
detect particular molecules in the environment and translate that information into an electrical impulse |
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Term
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Definition
| sense of smell is mediated by the olfactory nerve |
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Term
Where are olfactory cells located?
How do they transmit signals? |
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Definition
in mucosa-biplar neurons
the dendrites in the neurons transmit signals from epithelim which transmits to the axon to connect with olfactory nerve |
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Term
What are the receptor cells in Olfaction?
Where are they located? |
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Definition
| hairlike projections on surface of nasal mucosa olfactory glands in mucosa secretions create a thin layer of fluid molecules must be in a solution to be detected |
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Term
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Definition
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Term
What is gustation?
What gland do the secretion come from? |
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Definition
| taste food must be in a solution in order to be "tasted" watery secretions from glands of von Ebner help solubilize food particles |
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Term
| What are the taste cells? |
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Definition
arranged in a group with supporting cells, a cluster that constitutes the taste bud
taste buds located on tongue in association with various papillae |
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Term
| What is the Bulbous corpuscles? |
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Definition
| Sensory receptor to stretching skin |
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