Senses Flashcards
(24 cards)
The central pillar of spongy bone which supports the spiraling of the cochlea within the inner ear is called the_________.
modiolus
Describe the function of the spiral organ.
Convert sound vibrations into nerve impulses.
The membrane that separates the scala vestibuli from the scala tympani is the ______ membrane.
Basilar
The microvilli found on the hair cells of the spiral organ are called ______
stereocilia
Above the vestibular membrane of the cochlear duct is the ______.
scala tympani
The round window is covered by a membrane called the ______.
secondary tympanic membrane.
Identify the structure which contains the sense organ for hearing.
E. This is the cochlea.
Microvilli projecting from the apical domain of hair cells within the sensory epithelium of the spiral organ are referred to as _______.
stereocilia
Cranial nerve VIIi is formed by the union of the ______ and ______ nerves.
cochlear, vestibular
Below the basilar membrane of the cochlear duct is the ______ ______.
scala tympani.
The scala vestibuli begins near the _____ window and spirals back down to the base and ends at the ______ window.
oval, round.
Oval window is where the stapes hits the cochlea. the sound travels around and exits at the round window.
Within the inner ear, three semicircular ducts and two chambers (the saccule and the utricle) comprise the ______.
Vestibular apparatus.
Hair cells of the spiral organ are what type of cell?
Epithelial cells
Rotary movements of the head are sensed within the inner ear by receptors referred to as the ______ ducts.
The cochlear nerve and the vestibular nerve together form the ______ nerve.
vestibulocochlear (VIII)
A small patch of sensory hair cells and supporting cells located on the floor of the utricle and the wall of the saccule is referred to as a ______.
maculae.
The two areas of the brain that contain the vestibular nuclei that receive the initial equilibrium information are the ______.
medullla oblongata, pons.
The lacrimal apparatus drains tears into the nasal cavity via the ______.
nasolacrimal.
The three regions of the vascular layer (tunic) of the eye are ______.
- Ciliary Body
- Choroid
- Iris
The highly vascularized portion of the vascular tunic is referred to as the ____________.
Choroid
Changes in the diameter of the pupil of the eye due to alteration in light intensity is referred to as the
photopupillary relflex
Identify the optical components of the eye.
Lens
Aqueous humor
Vitreous body
Cornea
