Term
| Communication between and among nerve cells |
|
Definition
|
|
Term
Neurotransmission:
-Causes ___ to open and close
-Sends ___ signals |
|
Definition
|
|
Term
Neurotransmission-Current Flow
-current flow causes ___. ___ charge potential at a location in cell. Becomes a ___ as one charge comes in and another goes out. Positive polarity at one end and negative at the other.
-Stimulate a group of cells in order to collect a ___. Through bone, brain matter, skin, etc. take a lot of ___ activity to get response. |
|
Definition
| depolarization; Negative; dipole; response; electrical |
|
|
Term
| Endolymph is very similar to ___ fluid in its composition (high ___). Cortilymph is a mixture of ___ and ___, within the organ of corti |
|
Definition
| entracellular; potassium; endolymph and perilymph |
|
|
Term
Organ of Corti:
vestibular and cochlear aqueduct VA has ___ duct to transport endolypmh ending in endolymphatic sac in epidural space. CA manages ___ fluid, maintaining chemical composition (periototic duct). Communicates with ___ space |
|
Definition
| endolymphatic; perilymph; subarachnoid |
|
|
Term
Organ of Corti:
-about ___ OHCs
-overalls ___ hair cells on each OHC, bw __-__ stereocilia. arranged in a "__" type of formation
-IHCs: about ___, about 60 stereocilia per cell arranged in "__" shape.
-one ___ cell per OHC. |
|
Definition
| 12,000; 30,000; 50-150; w; 3500; u; Deiter |
|
|
Term
| pressure of fluid within inner ear pressure equilibrium = cochlear aqueduct fluid circulation is ___ ___. To keep it continuously ___ or ___. |
|
Definition
| vestibular duct; flowing; renewing |
|
|
Term
| What are some supporting structures? |
|
Definition
- Fluid communication routes (vestibular aqueduct, cochlear aqueduct)
-Stria vascularis
-Supporting cells: Henson,deiter's etc other supporting cells help cellular regulation |
|
|
Term
| IHC have ___ connection(s) to nerve, OHC typically have ___ connection(s). |
|
Definition
|
|
Term
Outer Hair Cells:
-___ transducer
-___ shape
-Tallest tips embedded in ___ membrane
-Cell longer in the ___ region than in ___ region |
|
Definition
| Mechanoelectrical; Cylindrical; tectorial; apical; basal |
|
|
Term
| ___ rows of stereocilia on IHC. Active component can be up to ___X larger than basilar membrane movement or vibration. Without active processes, wouldn't hear with as much ___-___ as we have. Would not hear the ___ sounds we can identify. Checking by ___. Active proves its creating a sound that comes back through ___ ___ to ear canal and we can pick up with a microphone. How much energy would it take for sound to come out backwards to ear canal? Oval window has to vibrate ossicles, then TM (going backwards). Really only helps us know if structure is ___. If have ___, may not collect a response or may get normal response. Varies. But if no response with perf, can't say bc ___ are damaged |
|
Definition
| Two; 100x; frequency-tuning; soft; OAEs; middle ear; damaged; perf; OHCs |
|
|
Term
| OHC are ___ transducers returning mechanical energy into electrical energy. Fluid motion. OHCs "dance." V strong attachment to ___ membrane. Purpose is to ___ soft sounds and loud sounds. Enhance and focus ___ of traveling wave - frequency fine-tuning. Also increasing soft sounds and decreasing loud sounds. Can amplify UP to ___ dB SPL. Help us hear through ___ conduction and help preserve phase information, helpful in localization (timing/phase info) |
|
Definition
| mechanoelectrical; tectorial; enhance; amplitude; 60; bone |
|
|
Term
IHC:
-___ transducer
-___ shape
-Not embedded in ___ membrane
-Stereocilia are shorter at ___ of cochlea than at ___ region |
|
Definition
| Mechanoelectrical; Flask; tectorial; base; apical |
|
|
