| A | B |
|---|
| Name the 3 MAJOR divisions of the ear. | External, middle and internal. |
| Name the 3 parts of the external ear. | Auricle (pinna), external auditory canal, eardrum (tympanic membrane) |
| Connects middle ear with nasopharynx. | Auditory (Eustachian) tube. |
| Name the 3 tiny bones of the middle ear. | Malleus (hammer), incus (anvil), stapes (stirrup) |
| The base of the stapes fits into the ___ window. | Oval window |
| Name the 3 major parts of the internal ear (labyrinth). | Vestibule, semicircular canals, cochlea |
| The portion of the internal ear that contains the hearing receptors is the ___. | Cochlea |
| Equlibrium receptors are found in which 2 main parts of the internal ear. | Vestibule and semicircular canals |
| The 3 channels within the cochlea are: | Scala vestibuli, scala tympani, scala media (cochlear duct) |
| The specific name of the structure containing the hearing receptors is the ____ ____ of ____. | Spiral organ of Corti |
| All sound waves originate from a ____ object. | Vibrating |
| The unit of measure for the frequency of vibration of sound waves is the: | Hertz (Hz) |
| The range of human hearing is approximately ___ to ____ Hz. | 20 to 20,000 |
| Frequency of vibration determines whether we can hear the sound or not; it also determines the ___ of sounds we hear. | Pitch |
| Intensity of sound is measured in ____. | Decibels (dB) |
| Equilibrium receptors located in the vestibule area are in 2 membranous sacs, the ___ and the __. | Utricle and saccule |
| The specific structures that contain the static equilibrium receptors are the ___. | Maculae |
| Dynamic equilibrium receptors are located in the ampullae of the semicircular ___. | Ducts---canals are the tunnels in bone, ducts are the membranous tubes within them. |
| Tilting the head forward or standing in an elevator going down activates the ___ equilibrium receptors. | Static |
| Going around the entrance ramp to an interstate or spinning in a desk chair activates the ___ equilibrium receptors. | Dynamic |
| Dynamic equilibrium receptors are in specific structures called ____. | Cristae |
| The gelatinous layer of the static equilibrium receptors is called the ____ ____. | Otolithic membrane |
| The gelatinous layer of the dynamic equilibrium receptors is called the ___. | Cupula |
| The area of the brain involved to a great extent with our sense of equilibrium is the ___. | Cerebellum |
| Our sense of hearing is centered in the ___ lobe of the brain. | Temporal lobe of cortex |
| The spiral organ rests on the ____ membrane. | Basilar |
| The ___ membrane floats in endolymph just above the hair cells of the spiral organ. | Tectorial |
