Concept G: Eye and Ear
Each eye has ______ lacrimal puncta.
2
______ of the eye is receded into the orbit.
80%
What is the function of the auditory ossicles?
Amplify sound
What chamber is between the iris and cornea?
Anterior chamber
What substance produced in the external ear impedes microorganism growth?
Cerumen
What causes Trachoma, a type of conjunctivitis?
Chlamydia
What is the largest structure of the vascular tunic?
Choroid
What structure is filled with pigment from melanocytes?
Choroid
What structure supplies nourishment to the retina?
Choroid
What type of photoreceptors detect color?
Cones
Which are activated by high-intensity light?
Cones
Which of the following are correct names for the tube that connects the middle ear to the nasopharynx?
Eustachian tube Pharyngotympanic tube Auditory tube
Which of the following are functions of the inner ear?
Hearing
Where are the photoreceptors located?
In the neural layer of the retina
What structure is the dividing line between the anterior and posterior chambers?
Iris
Order the structures of the vascular tunic from anterior to posterior.
Iris, Ciliary body, Choroid
Which are true of the conjunctiva?
It does not cover the cornea. It is vascular. It contains goblet cells.
Order these structures in the order that tears travel through them.
Lacrimal puncta Lacrimal canaliculus Lacrimal sac Nasolacrimal duct
What is the outermost layer of the neural layer of the eye?
Layer of photoreceptor cells
What structure focuses incoming light onto the retina?
Lens
What structure creates the "blind spot"?
Optic disk
Which layer of the retina provides vitamin A for the photoreceptor cells?
Pigmented layer
Which of the following are semicircular canals?
Posterior Anterior Horizontal
What structures make up the vestibule?
Saccule Semicircular canals Utricle
What structure makes up the posterior portion of the fibrous tunic?
Sclera
Which of the following are a part of the fibrous tunic?
Sclera Cornea
Order these structures from superficial to deep.
Sclera, choroid, pigmented layer of retina, neural layer of retina
Which of the following muscles are located within the middle ear?
Stapedius Tensor tympani
Which auditory ossicle contacts the oval window?
Stapes
True or false: The primary purpose of the eyebrows is to keep sweat out of the eyes.
True
What is another name for the ear drum?
Tympanic membrane
Which layer of the eye contains the blood and lymph vessels?
Vascular tunic
The tympanic cavity is filled with ______.
air
Sound waves are funneled into the ear by the ______.
auricle
The cartilaginous portion of the external ear is called the ______.
auricle
The spiral organ rests on the ______.
basilar membrane
Ciliary glands are found in the ______.
lacrimal caruncle
The nasolacrimal duct is found on the ______ side of the nose.
lateral
The suspensory ligaments connect the ______ to the ciliary muscles.
lens
The lacrimal caruncle is located at the ______ surface of the eye.
medial
The lacrimal caruncle is on the ______ side of the eye.
medial
Aqueous humor is secreted into the ______ chamber before traveling to the ______ chamber of the eye.
posterior, anterior
The ______, the black hole in the eye, is surrounded by the colorful ______.
pupil, iris
The vestibule contains two structures, the utricle and ______.
saccule
What structure is the "white" of the eye?
sclera
Tarsal glands are ______.
sebaceous glands
The ciliary muscles are made of ______.
smooth muscle
Where is the lacrimal gland located?
superior and lateral to the eye
The ______ ligaments connect the ciliary body to the lens. Multiple choice question.
suspensory
The inner ear is located in the ______ bone.
temporal
What type of fluid is found in the anterior cavity?
Aqueous humor
Which is true of the cornea?
Avascular
Which membrane is gelatinous?
Tectorial membrane
The primary function of the ______ is to prevent large objects from contacting the eye.
eyelash
The highest proportion of cones is found in the ______.
fovea centralis
Cranial nerve VIII innervates the ______.
inner ear
The sclera ______.
is made of dense connective tissue
Accommodation is the process of making the lens ______.
more spherical
Stapedius is the name of a ______.
muscle
The fat surrounding the eye is called ______ fat.
orbital
The lacrimal gland is made of two parts, the palpebral part and the ______ part.
orbital
Vibration of the tympanic membrane causes movement of the ______.
ossicles
The eyelids are also called ______.
palpebrae
The portion of the conjunctiva on the inside of the eyelid is called the ______.
palpebral conjunctiva
The semicircular canals are continuous with the _____.
utricle
In the eye, the ______ humor is gelatinous.
vitreous
What color is the macula lutea?
yellow
Earwax is a combination of dead skin cells and ______.
cerumen
Accommodation is controlled by the ______ division of the nervous system.
parasympathetic
The sphincter pupillae is controlled by the ______ division of the nervous system.
parasympathetic
The iris is continuous with the ______.
ciliary body
CN VIII has two divisions, the ______ branch and the ______ branch.
cochlear, vestibular
The sphincter pupillae ______ the pupil.
constricts
The limbus is the junction between the sclera and ______.
cornea
The optic disc is associated with ______.
cranial nerve II