Chapter 8 M/C

Which of the following is associated with the external (outer) ear?

auricle (pinna)

The three sets of color receptors within the retina are sensitive to wavelengths of visible light that are ________.

blue, green, and red

The membrane that covers the outer surface of the eye and lines the eyelids is the ________.

conjunctiva

As you complete a special senses 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

What condition results from an abnormally high pressure inside the eye?

glaucoma

Ophthalmia neonatorum, a congenital disorder, is a type of conjunctivitis related 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

Which of these structures is part of the system that produces and drains tears?

lacrimal gland

Which of the external eye muscles is controlled by cranial nerve VI (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 waves cause the tympanic membrane, or eardrum, 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 (pharyngotympanic) tube to the ________.

middle ear

Which area of the retina lacks rods and cones and therefore does not detect images?

optic disc (blind spot)

he region of the optic nerve lacking photoreceptor cells is known as the ________.

optic disc (blind spot)

Tiny stones made of calcium salts that roll in response to changes in gravitational pull are called ________.

otoliths

The small, peglike 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 function of the choroid layer of the eye is to ________.

prevent light from scattering inside the eye

The rounded opening of the iris through which light enters the eye is called the ________.

pupil

The innermost sensory layer of the eye that contains bipolar cells and ganglion cells is the ________.

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 the ________.

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

Hair cells that function as hearing receptors are located within the ________.

spiral organ of Corti

"Crossed eyes" resulting from unequal control of the external eye muscles 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

What part of the eye is affected by cataracts?

the lens

Where are olfactory receptors located?

the superior region of the nasal cavity

Sound waves entering the external auditory canal hit the eardrum, also known as the ________.

tympanic membrane

What sensation allows someone to enjoy the taste of a steak?

umami

The only special sense that is NOT fully functional at birth is ________.

vision

The gel-like substance 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)

The greatest visual acuity is housed in the ________.

fovea centralis

Static equilibrium receptors are located in the ________.

vestibule

The auditory ossicle called the "anvil" is also known as the ________.

incus

Which of the following is a sex-linked condition that more often affects males?

color blindness

The three cranial nerves that carry taste sensations to the brain are ________.

facial, glossopharyngeal, vagus

The pigmented portion of the eye that has a rounded opening through which light passes is the ________.

iris

The ________ gland is located above the lateral end of each eye and releases tears.

lacrimal

Which of these is associated with rods?

night vision

What is the function of the otoliths?

responding to changes in the pull of gravity and in acceleration when the body moves

Which of these are oriented in the three planes of space, allowing sensation of movement in any plane?

semicircular canals

Which of the following structures of the eye would NOT be affected by conjunctivitis?

the cornea

The structure that divides the outer ear from the middle ear is a membrane known as the ________.

tympanic membrane (ear drum)