Lab Exercise 13 Quiz Flashcards
The cochlea is found within the inner ear and contains fluid for hearing
False
Cranial nerve associated with olfaction
CN I - Olfactory
Optic disk
- located on the retina contains no rods or cones
- where the optic nerve exists in the eyeball
- lacks any photoreceptors
- does not contain neurons
- aka “blind spot”
Tympanic membrane
- aka eardrum
- separates external ear from middle ear
- transmits sound from air to auditory ossicles
Semicircular canals
- located within the inner ear and responsible for maintaining equilibrium
- contain stereocilia
Ciliary body
- part of the eye responsible for controlling shape of lens
* not responsible for diameter of pupil
Cochlea
- responsible for receiving vibrations and converting them to electrical signals in ear
- found within inner ear and responsible for hearing
- does NOT contain fluid for hearing
- contains stereocilia
Auricle
- The external portion of the ear
- aka pinna
- NOT composed of fatty tissue
Sclera
- The white outermost fibrous layer of the eye
* drains the aqueous humor
Iris
- A smooth muscle that opens or closes the pupil
- responsible for a persons eye color
- responsible for controlling diameter of pupil
Macula lutea
• yellow spot on the retina and within it is the fovea centralis, highest density of con receptors
Fovea centralis
- located within the macula lutea
- has the highest density of cone receptors
- The region of the retina where the light is most focused when the eye is looking directly at an object
- the portion of the retina with the greatest visual acuity
- contains only CONE cells, which are more tightly packed there than anywhere else in the retina
Ora serrata
- The anterior border of the retina where the choroid layer is exposed
- appears jagged edge
Eustachian tube
- transmits CN VII from cochlea towards brain? True or false? ➡️ false
- opens the pharynx and equalizes air pressure between outside air in the middle ear cavity
- found between MIDDLE ear and pharynx
Lacrimal gland
•found on LATERAL side of orbit and responsible for production of tears
Cornea
- the transparent layer of the fibrous layer
- continuation of sclera
- “window of the eye” helps focus light into lens
Optic nerve
- composed of neurons found in the retina
- composed of neurons found in the sclera? True of false? ➡️ false
- CN II - optic nerve
- lead away from eyeball toward cerebral visual cortex
Olfactory nerve exit
foramina of cribriform plate
Ossicles of the ear
- malleus (hammer)
- incus (anvil)
- stapes (stirrup)
CN VII - facial nerve
• responsible for sense of taste
Vitreous humor
- The content of region behind the lens, also called the posterior cavity
- made of semisolid material, keep the eyeball from collapsing, lasts a lifetime
- jelly like substance that fills the space between the lens in the retina
- helps maintain intraocular pressure
- functions in the re-fraction of light in the eye
Optic chiasm
- point where optic nerves are connected to each other just inside the cranial cavity and anterior to the pituitary gland
- area where medial ganglion cell axons cross over and project to opposite side of brain
Responsible for receiving vibrations and converting them to electrical signals
• auditory ossicles?
CN VIII - Vestibulicochlear nerve
- along this nerve the hair cells of the in we ear transmit information to the brain
- consists of cochlear nerve (carrying info about hearing); and the vestibular nerve (carrying info about balance)
CN I is responsible for
•olfaction
Lens
• responsible for amount of light that enters the eye
The cochlea is found within inner ear and contains fluid for hearing
➡️ false
-find out why this is false
The optic disk is the location on the retina that contains neurons
➡️false
-find out what area this is referring to ➡️ optic nerve
