A&P II Chapter 8 questions
What does membranous labyrinth contain?
Endolymph
What are the three areas of the ear?
External ear, middle ear, and inner ear
What are the two housing senses of the ear?
Hearing, equilibrium
How is aqueous humor reabsorbed?
Into venous blood through the scleral venous sinus, or canal of schlemm
What does the pharyngotympanic tube connect?
It connects the middle ear with the threat
The small, peglike projections of the tounge's surface are called?
Papillae
What is membranous labyrinth suspended in?
Perilymph
What is light bent or refracted by?
The cornea, aqueous humor, lens, and vitreous humor
Where must light be focused for optimal vision?
To a point on the retina
When do cataracts result?
When the lense becomes hard and opaque with age
The transparent portion of the fibrous layer of the eye is the?
cornea
What structures refract light before it hits the retina?
cornea, humors, and lens
What is located in the superior-lateral region of the orbit?
lacrimal gland
What structure is part of the system that produces and drains tears?
lacrimal gland
The biconvex structure that focuses light on the retina is the?
lens
What flexible, crystal-like structure of the eye focuses light on the retina?
lens
Identify the pathway of vibrations as they travel from the tympanic membrane to the ossicles _____________
malleus, incus, stapes
Our sense of static equilibrium is created by the?
movement of otoliths along hair cells
At what point do some axons leave the optic nerve and cross to the opposite side of the brain?
optic chiasma
Fibers from the medial side of each eye cross over to the opposite side of the brain at the?
optic chiasma
What region of the retina lacks photoreceptor cells?
optic disc (blind spot)
Tiny stones made of calcium salts that roll in response to changes in gravitational pull are called?
otoliths
What part of the retina absorbs light and prevents it from scattering inside the eye?
pigmented layer
The function of the choroid layer of the eye is to?
prevent light from scattering inside the eye
What is a part of the sensory layer of the eye?
retina
Which layer of the eye contains photoreceptors known as rods and cones?
retina
Which layer of the eye contains rods and cones?
retina
Dynamic equilibrium receptors that detect information about angular or rotational movements of the head are housed in the?
semicircular canals
Hair cells that function as hearing receptors are located within the?
spiral organ of Corti
What sensation is related to sitting motionless at a desk studying your anatomy and physiology material?
static equilibrium
The five taste sensations are ___________________
sweet, sour, bitter, salty, umami
The five taste sensations are...
sweet, sour, bitter, salty, umami
What senses use chemoreceptors?
taste and smell
What part of the eye is affected by cataracts?
the lens
Where are taste buds found?
the sides of papillae
Where are olfactory receptors located?
the superior region of the nasal cavity
The "hairs" of the hair cells within the organ of Corti are embedded in what?
the tectorial membrane
Sound waves entering the external acoustic meatus (auditory canal) hit the eardrum , also known as the?
tympanic membrane
What membrane divides the outer ear from the middle ear?
tympanic membrane (ear drum)
What sensation allows someone to enjoy the "beef taste" of a steak?
umami
What is the orientation of images formed on the retina?
upside down and reversed left to right
What are equilibrium receptors of the inner ear called?
vestibular apparatus
Static equilibrium receptors are located in the?
vestibule
What is associated with rods?
vision in dim light
The gel-like substance housed in the posterior segment of the eye is the?
vitreous humor (body)
What structure is lined with ceruminous glands?
external acoustic meatus (auditory canal)
Which area of the retina has the highest concentration of cones?
fovea centralis
Hearing receptors within the spiral organ of the Corti are called __________________
hair cells
What must be stimulated in order for the sense of hearing to be transmitted to the cochlear nerve?
hair cells
Where are there no photoreceptor cells?
At the optic disc or the blind spot
What are taste buds frequently replaced by?
Basal cells
A person with total color blindness may lack?
cones
The membrane that covers the outer surface of the eye and lines the eyelids is the?
conjunctiva
The auditory ossicle called the "anvil" is also known as the?
incus
The pupil is an opening within the?
iris
What gland releases tears onto the anterior surface of the eyeball?
lacrimal
Which gland is located above the lateral end of each eye and releases tears?
lacrimal