Term
| Name the 3 divisions of the ear |
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Definition
1. Outer
2. Middle
3. Inner |
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Term
| How many structures are does the outer ear contain? |
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Definition
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Term
| What is the primary function of the outer ear? |
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Definition
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Term
| Name the 4 structures of the outer ear? |
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Definition
1. Auricle (Pinna)
2. External acoustic meatus (canal)
3. Tympanic membrane
4. Cermuninous glands |
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Term
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Definition
| The fleshy part of the outer ear |
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Term
| What is the function of the outer ear? |
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Definition
| To funnel airwaves into the external acoustic meatus |
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Term
| Name the two portions of the auricle |
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Definition
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Term
| The helix is composed primarily of ______ tissue |
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Definition
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Term
| The earlobe is composed primarily of ______ tissue |
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Definition
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Term
| Describe the acoustic auditory meatus |
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Definition
| Short, curved, tubular passageway |
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Term
| What lines the acoustic auditory meatus? |
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Definition
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Term
| What is the function of the external auditorty meatus? |
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Definition
| To funnel soundwaves to the tympanic membrane |
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Term
| (T/F) the external acoustic meatus is carved into the temporal bone |
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Definition
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Term
| The external acoustic meatus is ____ cm in length and ____ cm in diameter |
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Definition
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Term
| What is another name for the tympanic membrane? |
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Definition
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Term
| What is the function of the tympanic memb? |
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Definition
| To transfer soundwaves into the middle ear as mechanical energy (vibrations) |
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Term
| What vibrates the eardrum? |
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Definition
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Term
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Definition
| Thin, translucent CT membrane |
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Term
| What do the ceruminous glands do? |
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Definition
| Produce and secrete the substance known as earwax |
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Term
| What is the function of earwax? |
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Definition
| A trap for small bugs and other parasites |
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Term
| What is the middle ear mostly involved in? |
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Definition
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Term
| Name the 5 structures within the middle ear |
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Definition
1. tympanic cavity
2. Pharyngotympanic tube
3. Auditory Ossicles
4. Tensor Tympani
5. Stapedius muscle |
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Term
| Describe the tympanic cavity |
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Definition
| Small, air filled cavity within the temporal bone |
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Term
| What two structures are in the wall of the tympanic cavity? |
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Definition
| Round window and oval window |
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Term
| What are the other names for the pharyngotympanic tube? |
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Definition
| Eustachian tube, auditory tube |
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Term
| What does the eustachian tube do? |
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Definition
| Connects the middle ear with the pharyx |
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Term
| What is the function of the auditory tube |
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Definition
| To equalize the pressure of the middle ear with the atmospheric pressure to allow it to vibrate properly and to prevent distortion of the membrane |
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Term
| (T/F) The tissue lining the tympanic cavity and auditory tube is continuous with the lining of the throat |
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Definition
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Term
| How long is the auditory tube? |
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Definition
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Term
| What is often the cause of a middle ear infection? |
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Definition
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Term
| Why are middle ear infections more prevalent in children> |
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Definition
| The auditory tube is shorter therefore it is easier for infection to spred |
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Term
| Name the 3 auditory ossicles |
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Definition
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Term
| (T/F) the auditory ossicles are the smallest bones in the human body |
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Definition
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Term
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Definition
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Term
| How do the bones stay in place? |
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Definition
| They are suspended by ligaments |
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Term
| What is the other name for the malleus? |
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Definition
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Term
| What is the other name for the incus? |
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Definition
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Term
| What is the other name for the stapes? |
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Definition
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Term
| Name the two muscles in the tympanic cavity |
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Definition
| Tensor tympani, and stapedius |
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Term
| (T/F) the tensor tympani and stapedius are the two smallest muscles in the human body |
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Definition
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Term
| What is the function of the tensor tympani |
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Definition
| Upon contraction, pulls on the malleus therefore putting tension on the tympanic membrane, minimizing movement |
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Term
| What is the function of the stapedius? |
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Definition
| Contraction pulls on the stapes, reducing the possible amount of movement |
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Term
| What is the main function of the middle ear? |
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Definition
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Term
| What are the functions of the inner ear? |
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Definition
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Term
| Name the two labryths of the inner ear? |
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Definition
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Term
| What is contained in the membranous labyrinth? |
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Definition
| Endolymph and the receptors for both equilibrium and hearing |
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Term
| What is contained in the bony labyrinth? |
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Definition
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Term
| Name the 3 parts of the bony labrynth. |
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Definition
1. Vestibules
2. Semi-circular canals
3. Cochlea |
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Term
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Definition
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Term
| What is the sensory unit within the vestibules? |
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Definition
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Term
| The maculae of the saccule are oriented in which direction? |
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Definition
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Term
| The maculae in the saccule detect which forces? |
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Definition
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Term
| The maculae in the utricle are oriented in which direction? |
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Definition
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Term
| The maculae in the utricle detect which forces? |
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Definition
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Term
| What are the sensory cells within the maculae? |
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Definition
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Term
| What is the unit on the hair cell that gets distorted? |
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Definition
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Term
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Definition
| The entire complex of gelatinous mass and staticonia |
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Term
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Definition
| Calcium carbonate crystals in the otolith |
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Term
| What cells support the hair cells? |
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Definition
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Term
| Name the otolith organ that detects rotation |
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Definition
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Term
| Name the 3 semicircular canals |
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Definition
1. Anterior
2. Posterior
3. Lateral |
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Term
| What type of movement does the anterior semicirc canal detect? |
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Definition
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Term
| What type of movement does the posterior semicirc canal detect? |
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Definition
| Tilting head side to side |
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Term
| What type of movement does the lateral semicirc canal detect? |
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Definition
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Term
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Definition
| The swollen portion within the semicric canals that contains the receptive organs |
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Term
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Definition
| The gelatinous structure that the stereocilia is embedded in |
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Term
| Besides stereocilia, what does each hair cell contain in the ampulla? |
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Definition
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Term
| What structure are the semicircular canals continuous with? |
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Definition
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Term
| What structure is responsible for sound sensation? |
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Definition
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Term
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Definition
| The central hub that the cochlea is wound around |
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Term
| What does the modiolus house? |
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Definition
| The spiral ganglion (cell bodies of the cells monitoring the receptors in the cochlear duct) |
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Term
| What are the 3 ducts of the cochlea? |
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Definition
| Vestibular, cochlear and tympanic |
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Term
| What are the other names for the 3? |
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Definition
| Scalas; vestibuli, madia, tympani |
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Term
| Endolymph is contained in which structure |
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Definition
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Term
| Perilymph is contained in whichs tructure? |
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Definition
| Vestibular and tympanic ducts |
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Term
| What does the cochlear duct contain? |
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Definition
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Term
| What is the organ of corti? |
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Definition
| The sensory complex for sound |
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Term
| What seperates the vestibular and cochlear ducts? |
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Definition
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Term
| What separates the cochlear and tympanic duct |
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Definition
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Term
| What does the organ of corti contain? |
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Definition
| Hair cells, tectorial and basilar membranes |
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Term
| What are the stereocilia of the hair cells embedded in? |
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Definition
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Term
| Distortion of the organ of corti is caused by what? |
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Definition
| Waves in the perilymph created at the oval window |
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Term
| What is the function of the round window? |
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Definition
| To alleviate the pressure in the perilymph |
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