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