chapter 16

Each eye has ___ lacrimal puncta

2

What is the name of the elevated region of the ampulla of the semicircular canal?

Crista ampullaris

Which are true of the olfactory hairs? They extend from the olfactory tract. They are immobile. They are unmyelinated.

They are immobile. They are unmyelinated.

The tympanic cavity is filled with _____

air

The semicircular ducts are involved in detecting _______ acceleration

angular

Which cavity of the eyeball is divided into an anterior and posterior chamber?

anterior cavity

What type of fluid is found in the anterior cavity of the eyeball?

aqueous humor

What type of photoreceptors detects color?

cones

Light rays are refracted or bent when they pass through two media of different ______.

densities

The outmost layer of the eye is called the ______ tunic.

fibrous

The lens is ______ when we are viewing faraway objects.

flattened

What disease causes fluid build up in the eye, dislocating the lens?

glaucoma

Which may result in symptoms such as reduced field of vision, dim vision, and/or halos around lights? myopia astigmatism macular degeneration glaucoma

glaucoma

Where are photoreceptors located?

in the neural layer of the retina

What structure is the dividing line between the anterior and posterior chambers?

iris

Pacinian corpuscles are also called ______.

lamellated corpuscles

The optic disc contains ______ photoreceptors.

no

The sphincter pupillae is controlled by the ______ division of the nervous system.

parasympathetic

What type of receptor monitors changes in body position?

proprioception

The types of the receptor that include only the somatic sensory receptors within joints, muscles, and tendons are called

proprioceptors

The lens is ______ when we are viewing close-up objects.

rounded

The vestibule contains two structures, the utricle, and

saccule

Which auditory ossicle contacts the oval window?

stapes

Somatic receptors are found within ______.

the body wall

The vascular tunic of the eye is also called the ______

uvea

Which layer of the eye contains the blood and lymph vessels?

vascular tunic

Which are true of rods? They function well in dim light. They are concentrated at the visual axis of the eye, near the center of the retina. They discriminate between colors. There are more than 100 million rod cells per eye. They provide a crisp, focused vision.

They function well in dim light. There are more than 100 million rod cells per eye.

Sound waves are funneled into the ear by the ______.

auricle

Which type of receptor detects pressure changes? nociceptors thermoreceptors chemoreceptors baroreceptors

baroreceptors

Receptors that detect chemicals are called

chemoreceptors

The optic disc is associated with ______.

cranial nerve II

Which are the correct names for the tube that connects the middle ear to the nasopharynx? eustachian tube pharyngotympanic tube external auditory canal auditory tube

eustachian tube pharyngotympanic tube auditory tube

What type of receptors detects deep pressure and vibration?

lamellated corpuscles

The nasolacrimal duct is found on the ______ side of the nose.

lateral

The utricle and saccule are involved in functions involving the position of the head? linear acceleration hearing static equilibrium angular acceleration

linear acceleration static equilibrium

A lack of photoreceptors in this structure creates the "blind spot"?

optic disc

If stimulated over a period of time, _____________ receptors lose eventually sensitivity.

phasic

Aqueous humor is secreted into the _______ chamber before traveling to the _______ chamber of the eye.

posterior ; anterior

The sclera ______. allows light to enter the eye is made of loose connective tissue provides for eye shape is made of dense connective tissue

provides for eye shape is made of dense connective tissue

As tears drain through the lacrimal caruncle, they enter small holes called the lacrimal

puncta

Which structures are part of the vestibular complex? saccule utricle cochlea middle ear semicircular ducts

saccule utricle semicircular ducts

Localization and sensitivity are easily determined in a ______ receptive field

small

Tactile cells associated with tactile discs are located in the ______. Multiple choice question.

stratum basale

True or false: It is the utricle and saccule that inform your brain that your head is upright.

true

Olfactory receptor cells are ______ neurons.

bipolar

What type of receptor detects molecules dissolved in fluid?

chemoreceptors

The auditory sensory axons of the _______ branch of cranial nerve number ___________ terminate in the cochlear nucleus within the brainstem.

cochlear ; VIII

The cochlea has three fluid-filled ducts. Which are the names of these ducts? cochlear duct tectorial membrane semicircular duct scala vestibuli scala tympani

cochlear duct scala vestibuli scala tympani

The receptors for the special senses are found within the ______

cranium

What is the name of the gelatinous dome with embedded stereocilia of the semicircular canal?

cupula

Accommodation is the process of making the lens ______.

more spherical

The vibration of the tympanic membrane causes ______.

movement of the ossicles

What type of receptor can undergo adaptation?

phasic

A flattened dendritic disc is a type of unencapsulated receptor called a ______.

tactile disc

Tactile cells are associated with ______.

tactile discs

Stretch receptors in the stomach would be classified as what type?

visceral sensory

In the eye, the ________ humor is gelatinous

vitreous

The posterior cavity contains the ______ humor.

vitreous

When the ________ membrane moves, the ________ on the spiral organ hair cells distort because they are anchored by the tectorial membrane.

basilar ; stereocilia

The area that a receptor cell gathers information from is called the ______.

receptive field

Which are a part of the fibrous tunic? sclera cornea iris

sclera cornea

When a figure skater does a lengthy spin on the ice, it is the sensory receptors in her ______ canals of the inner ear that are informing her brain about the position of her moving head.

semicircular

What are the functions of the auditory ossicles? funnel sound into the ear canal transmit sounds waves to inner ear open the tympanic membrane amplify sound

transmit sounds waves to inner ear amplify sound