A&P: Ch 10 (no graphic)

The transmission of sound waves through the tympanic cavity of the middle ear occurs through

• air
• nerve fibers
• bone
• fluid
• jelly-like vitreous humor

Which of the following is not one of the auditory ossicles?

• malleus
• incus
• stapedius

Middle ear infection may follow a throat infection because

• the auditory (eustachian) tube opens into the base of the inner ear.
• The auditory (eustachian) tube connects the middle ear to the throat.
• the sphenoid sinus opens into the tympanic cavity of the middle ear.
• the vestibulocochlear nerve passes through the tympanic cavity.

In the physiology of hearing, which action is it that generates an action potential that causes release of a neurotransmitter substance?

• movement of cells in the basilar membrane against the spiral organ (= organ of corti)
• pressure waves on cells of the vestibular membrane
• movement of the spiral organ (= organ of corti) hair cells
• movement of the membrane covering the round window

Otoliths are located in the

• utricle
• semicircular ducts
• saccule
• Both utricle and saccule

The aqueous humor

• provides nutrients for the retina.
• is produced from capillaries in the iris.
• can cause cataracts if overproduced.
• is present in the anterior chamber.

Which of the following is not part of the vascular layer of the eye?

• cornea
• choroid
• ciliary body
• iris

The visible outer white surface of the eye is covered by a distinctive epithelium continuous with the inner lining of the eyelids. This epithelium is called the

• palpebrae
• fornix
• corneal epithelium
• conjunctiva

What structure regulates the amount of light passing to the visual receptors of the eye?

• cornea
• pupil
• lens
• ciliary body
• iris

Vision is most acute when light rays are brought to focus on the

• fovea centralis
• the outermost layer of the retina
• optic disc
• cells in the occipital lobes of the brain