Anatomy, chapter 8
Fovea Centralis
area greatest visual acuity.
Which of the following is associated with the external (outer) ear?
auricle (pinna).
Optic Disc
blind spot.
The three sets of color receptors within the retina are sensitive to wavelengths of visible light that are?
blue, green, and red.
Astigmatism
blurry images due to unequal curvatures of the cornea or lens.
Which of the following is sex-linked condition that more often affects males?
color blindness.
The membrane that covers the outer surface of the eye and lined the eyelids is the _________?
conjuctiva.
Retina
contains millions of photoreceptors.
Hyperopia
eyeball is "too short".
As you complete a special sense lab, you discover your lab partner is able to taste a substance you put on the tip of his tongue. Which cranial nerve was stimulated by these taste buds?
facial nerve.
The three cranial nerves that carry taste sensations to brain are?
facial, glossopharyngeal, vagus.
Lens
flexible biconvex crystal-like structure.
What condition results from an abnormally high pressure inside the eye?
glaucoma.
Ophthalmia neonatrum, a congenital disorder, is a type if conjunctivitis realted to the disease?
gonorrhea.
Hearing receptors within the spiral organ of Corti are called?
hair cells.
What is a possible cause of conduction deafness?
inability of auditory ossicles to vibrate.
Glaucoma
increased pressure within the eye, which causes pain and possibly blindness.
The auditory ossicle called the "anvil" is also known as the?
incus.
Conjuctivitis
inflammation if the conjuctiva.
Fluid-filled part of the ear
inner ear.
Which of these structures is part of the system that produces and drains tears?
lacrimal gland.
The __________ gland is located above the lateral end of each eye and releases tears.
lacrimal.
Which of the external eye muscles is controlled by cranial nerve IV (abducens)?
lateral rectus.
The biconvex structure that focuses light on the retina is the?
lens.
Which of these provides sensory input that helps keep the head erect?
maculae of the vestibule.
Which of the following is the auditory ossicle that attaches to the tympanic membrane?
malleus (hammer).
The vibration of sound waved cause the tympanic membrane to move against an ossicle known as ___________.
malleus or hammer.
Identify the pathway of vibrations as they travel from the tympanic membrane to the ossicles:
malleus, incus, stapes.
An ear infection following an illness such as a cold can pass from the throat through the auditory tube to the?
middle ear.
Location of ossicles
middle ear.
Location of the pharyngotympanic (auditory) tube
middle ear.
The region of the optic nerve lacking photoreceptor cells known as the?
optic disc (blind spot).
Which area of the retina lacks rods and cones and therefore does not detect images?
optic disc (blind spot).
Tine stones made of calcium salts that roll in response to changed in gravitational pull are called?
otoliths.
Location of auricle (pinna) and external acoustic meatus
outer ear.
Location of ceruminous glands
outer ear.
The small, peg-like projections of the tongue's surface are called?
papillae.
After the age of 40 the elasticity of the lens decreases, making it difficult to clearly see close objects. What is this condition called?
presbyopia.
The rounded opening of the iris through which light enters the eye is called the _________.
pupil.
What is the function of otoliths?
responding to changed in the pull if gravity and in acceleration when the body moves.
The innermost sensory layer of the eye that contains bipolar cells and ganglion cells is that?
retina.
Which layer of the eye contains rods and cones?
retina.
Which of these is part of the sensory layer of the eye?
retina.
The fibrous covering of the eye consists of the white outer layer, known as the ________, and a transparent portion known as that __________.
sclera; cornea.
The aqueous humor of the eye is reabsorbed into venous blood through the?
scleral venous sinus (canal of Schlemm).
Dynamic equilibrium receptors that detect information about angular or rotational movements of the head are housed in the?
semicircular canals.
Which of these is oriented in the three planes of space, allowing of movement in any plane?
semicircular canals.
Hair cells that function as hearing receptors are located within the?
spiral organ of Corti.
"Crossed eyes" resulting from unequal control of the external rye msucled is is called?
strabismus.
The five taste sensations are?
sweet, sour, bitter, salty, umami.
The external acoustic meatus (auditory canal) is a narrow chamber situated in the _________ bone.
temporal.
Which of the following structure of the eye would NOT be affected by conjunctivitis?
the cornea.
What part of the eye is affected by cataracts?
the lens.
Where are olfactory receptors located?
the superior region of the nasal cavity.
Cornea
transparent portion of the fibrous layer.
What sensation allows someone to enjoy the taste of steak?
umami.
The gel-like substances houses in the posterior housed in the posterior segment of the eye is the?
vitreous humor (body).
The gel-like substance that reinforces the eyeball and prevents it from collapsing inward is the?
vitreous humor (vitreous body).
Sclera
white of the eye.
The greatest visual acuity is housed in the ___________.
fovea centralis.
Lacrimal gland
gland that releades tears.
Location if the vestibular apparatus
inner ear.
Location of equilibrium receptors
inner ear.
Location of otoliths
inner ear.
Location of the cochlea
inner ear.
The pigmented portion of the eye that has a rounded opening through which light passes in the?
iris.
Tympanic membrane separates the outer ear from this region
middle ear.
Myopia
nearsightedness.
Which of these is associated with rods?
night vision.
The function of the choroid layer of the eye is to?
prevent light from scattering inside the eye.
Night Blindness
prolonged vitamin A deficiency results in deterioration if the neutral retina.
Sound waved entering the external auditory canal hit the eardrum, also known as the?
tympanic membrane.
The structure that divides the outer ear from the middle ear is a membrane known as the?
tympanic membrane.
Cones
type if photoreceptor cell that detects colors.
Vitreous Humor
type of humor located in the posterior segment.
Static equilibrium receptors are located in the?
vestibule.
The inly special sense that is NIT fully functional at birth is?
vision.