26326406
Description
Flashcards by Diamond Sapphire, updated more than 1 year ago
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Created by Diamond Sapphire
over 3 years ago
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| Question | Answer |
| What are the 2 components of the external ear? | 1. Auricle 2. External acoustic meatus |
| External ear: has a ___ core; supported by muscles and can be turned to trap ___ ___ | Cartilage; sound wave |
| What are the 3 components of the middle ear? | 1. Tympanic cavity 2. Tympanic membrane 3. 3 ossicles and associated muscles and ligaments (malleus, incus, and stapes) |
| Tympanic cavity muscles | Stapedius and Tensor tympani |
| What are the 2 main components of the internal ear? | 1. Bony labyrinth 2. Membranous labyrinth |
| Tympanic cavity: auditory tube - connects the ___ ___ with the nasopharynx - __ ___ epithelium - contain ___ cells | Middle ear; Pseudostratified columnar; Goblet |
| Is perilymph associated with the bony labyrinth or the membranous labyrinth? | Bony labyrinth |
| Is endolymph associated with the bony labyrinth or the membranous labyrinth? | Membranous labyrinth |
| What are the 2 main components of the bony labyrinth? | 1. The cochlear 2. The semicircular canals |
| What are the 4 main components of the membranous labyrinth? | 1. Cochlear duct 2. Semicircular ducts 3. Utricle 4. Saccule |
| What are the 3 main functions of the internal ear? | 1. Sensory sound processing (cochlear) 2. Balance (semicircular duct) 3. Nerve supply is through the vestibulocochlear nerve (cranial nerve 8) |
| What are the 3 semicircular canals of the bony labyrinth? | 1. Anterior 2. Posterior 3. Lateral |
| Connects the cochlear to the semicircular canals | Vestibule |
| Spiral tunnel around the central axis of spongy bone called modiolus | Cochlear |
| What are the parts of the cochlear? | Scala tympani (ST). scala vestibuli (SV), and helicotrema |
| ___ fills the space between the periosteum and membranous labyrinth | Perilymph |
| ___ ___ produces endolymph | stria vascularis |
| what are the 4 walls/membranes of the cochlear duct? | vestibular membrane, basilar membrane, stria vascularis, and tectorial membrane |
| What are the 3 main cells of the cochlear duct? | Hair cells, supporting cells, and spiral ganglion |
| Besides creating endolymph, what is the other function of the stria vascularis? | regulate ion content |
| What are the 3 epithelial cell types found within the stria vascularis | marginal cells, intermediate cells (contain melanin), and basal cells |
| this organ is also called the Organ of Corti | spiral organ |
| what are the 3 major components of the spiral organ? | sensory cells, supportive structure and cells, and cochlear branch of the vestibulocochlear nerve |
| the sensory hair cells are arranged in 2 rows: the cylindrical ___ ___ cells and the pear shaped ___ ___ cells | outer hair; inner hair |
| gelatinous structure whose lower part of the membrane rests on the tip of the tallest stereocilia of the outer hair cells | tectoral membrane |
| bipolar neurons that project into inner hair cells | spiral ganglion |
| the vestibular apparatus contains the ___ ___ which are housed in the semicircular canals and the ____ and ___ which are housed in 2 depressions of the vestibule | semicircular ducts; utricle; saccule |
| the enlarged portion of the semicircular ducts is the ___ | ampulla |
| the vestibular apparatus contains what 3 organs of equilibrium? | Crista ampullaris, macula utriculi, and macula sacculi |
| sensory hair cells of the crista ampullaris project into the gelatinous ___ | cupula |
| cupula has embedded Ca++ crystals called ___ | ololiths |
| in utricle and saccule, the ___ is the midline | striola |
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