Exercise 10
Why is the optic disc known as the blind spot?
There is no retinal layer so there are no cones and rods.
What do the receptor cells for hearing, static equilibrium, and dynamic equilibrium have in common?
They all have hair bundles (stereocilia)
The lateral rectus moves the eyeball laterally. T/F?
True
This membrane separates the superior chamber of the cochlea from the cochlear duct
Vestibular membrane
This membrane separates the superior chamber of the cochlea from the cochlear duct.
Vestibular membrane
The nerve of hearing and balance is
Vestibulocochlear
The first step in the visual transduction process that occurs in the retina is
absorption of light by photopigments.
Pressure waves in endolymph cause the (blank) to vibrate, which moves hair cells of the (Blank). The hair cells touch (blank) which bends the stereocilia and generates nerve impulses in first-order neurons.
basilar membrane, spiral organ, and tectorial membrane
The Photo-receptors Rods for what color?
black and white vision
The lens accommodates when contraction of _______ pulls on _______.
ciliary muscle; zonular fibers
Cones for what color?
color vision
______ receptors are primarily used for detecting light rays under bright light conditions.
cones
The inferior oblique moves the eyeball superiorly T/F?
false
The neurons of the Retina is Multipolar T/F?
false
The ______ regulates the amount of light entering the eyeball through the pupil.
iris
Most inner layer of the eye
retina
Which of the following is NOT part of the vascular tunic?
retina
Which structures contain endolymph?
saccule, utricle and cochlear duct
Dynamic equilibrium is maintained by the
semicircular canals.
Eardrum is known as Tympanic Membrane T/F?
true
Eustachian tube maintains the air balance of the middle ear cavity T/F?
true
Eye is an organ of Nervous system T/F?
true
The iris controls the size of the pupil T/F?
true
The scala tympani and scala vestibuli both contain perilymph T/F?
true
The sensory area of the vision is located in Occipital cortex T/F?
true
The spiral organ of Corti is the receptor for hearing T/F?
true
Which structures are associated with equilibrium? Select all that apply.
vestibule, saccule, semicircular ducts, ampullae,
What lies between the lens and the retina?
vitreous chamber
How many extrinsic eye muscles are responsible for moving each eye?
6
Which of the following are interconnected components of the bony labyrinth? Semicircular canals Vestibule All of these choices are correct Cochlea
All of these are of correct
Which of the following sections of the membranous labyrinth contain equilibrium receptors? All of these choices are correct Saccule Utricle Ampulla
All of these choices are correct
Which of the following statement(s) is/are correct? The tongue receptors for sour are located at the sides. All of these choices are correct. The tongue receptors for bitter are located at the back. The tongue receptors for sweet and salty are located at the tip.
All of these choices are correct.
Which is the correct sequence of accessory eyeball structures and fluids through which light passes before it hits the retina?
Bulbar conjunctiva, cornea, aqueous humor, pupil, aqueous humor, lens, vitreous body
This structure produces aqueous humor.
Ciliary process
The nerve of the vision is
Optic
The cochlear duct contains perilymph T/F?
False
The stapes is the middle auditory ossicle T/F?
False
When you lick ice cream off an ice cream cone, which papillae are involved in scraping the ice cream off the cone?
Filiform papillae
Which auditory ossicle is attached to the tympanic membrane?
Malleus
Diving to the bottom of a deep pool will sometimes cause discomfort in the middle ear. This causes discomfort because the pressure inside the middle ear is
less than the outside pressure. The tympanic membrane is pushed toward the middle ear causing discomfort unless the pressure within the ear is equalized with external pressure.
Otoliths are located in the
macula of the saccule
