sensory

order that light would pass through them before reaching the retina.

1. cornea 2. aqueous humor 3. lens 4. vitreous humor

chorioid function

absorbs stray light

descriptions of the choroid layer of the human eye.

absorbs stray light has an extensive blood supply contains a dark pigment

The ability of the eye to focus at close distances by becoming more rounded as the ciliary muscles contract is called visual

accommodation

pupil function

admits light

The fluid in the ______ compartment of the eye is the aqueous humor while the fluid in the ______ chamber is the vitreous humor.

anterior; posterior

In the human eye, the ______ humor is watery in consistency, the ______ humor is gelatinous.

aqueous; vitreous

malleus description of location

attach to the tympanic membrane

stapes description of location

attached the oval window

incus description of location

attached to the other two bones

The area of the eye where the optic nerve leaves the retina, and which therefore contains no photoreceptors is the

blind spot

Sensory receptors that are plasma membrane receptors that bind to particular molecules are most likely

chemoreceptors

fovea centralis function

contains mostly cones for acute vision

retina function

contains photoreceptors for sight

The clear portion of the anterior portion of the outer layer of the eye is called the

cornea

The transparent portion of the outer eye that allows light to enter the eye is the

cornea

structures involved with focusing light onto the retina.

cornea ciliary muscle lens

Sensory receptors in the skin that detect touch, pressure, pain, and temperature are collectively called receptors.

cutaneous

Which type of somatic receptor detects touch and pressure in the skin?

cutaneous receptors

The tympanic membrane is commonly called the .

eardrum

True or false: If you draw a dot on a piece of paper and move it slowly towards you with both eyes open, the dot eventually disappears due to your blind spot.

false

The region of the retina where the cone cells are most densely packed and images are sharpest is called the _____________ centralis.

fovea

The area of the retina where cones are most densely concentrated is the

fovea centralis

An abnormally high buildup of aqueous humor in the eye is called .

glaucoma

When drainage ducts of the anterior compartment are blocked and aqueous humor builds up the condition is known as

glaucoma

The sensory receptor cells for the senses of hearing and balance are called

hair cells

ciliary body function

hold lens in place, accomodation

Most cutaneous receptors are located

in the dermis

The part of the eye that controls the size of the pupil is the

iris

When someone refers to blue eyes, they are specifically referring to the color of the______.

iris

The ciliary muscle of the eye changes the shape of the _______

lens

The eye structure that changes shape in order to focus an image on the retina is the

lens

What structure divides the eye into anterior and posterior chambers?

lens

rod cells function

make black and white vision possible

fovea centralis

makes acute vision possible

rod cells

makes black-and-white vision possible

cone function

makes color and acute vision possible

cone cells

makes color vision possible

The ossicles of the middle ear comprise three small bones: the

malleus, incus, and stapes

all structures that are components of the human outer ear.

modified sweat glands pinna auditory canal

The olfactory cells are located in the

nasal cavity

A sensory receptor is often a modified version of what type of cell?

neuron

what are the to types of chemoreceptors?

olfactory cells and taste cells

The sensory receptors for the sense of smell are called ______________ cells

olfaltory

Individuals with color blindness are missing

one or more types of cones

The _______ nerve carries signals from the retina to the visual cortex of the cerebrum.

optic

The area where the optic nerves cross after leaving the eyes is the

optic chiasma

The nerve that leaves the back of each eye is the

optic nerve

the blind spot is the area of the eye where the _____ _____ exits the retina.

optic nerve

After leaving the optic chiasma, a visual impulse would next travel to the

optic tracts

The external flap of the human outer ear is called the

pinna

The retina is located in what part of the eye?

posterior compartment

The mechanoreceptors that detect the stretch of tendons and relaxation of muscles are known as

proprioceptors

sclera function

protect and support the eye

The opening in the front of the human eye through which light passes is called the

pupil

The layer of the human eye that contains the rods and cones is called the ________

retina

The three layers, or coats, of the human eye are the choroid, the sclera, and the

retina

Mechanoreceptors in the semicircular canals function in

rotational equilibrium.

The outermost layer of the human eye is the

sclera

The white fibrous outer layer of the of the eyeball is the .

sclera

Select the three layers of the human eye.

sclera, choroid, and retina

Receptors for rotational equilibrium are located in the

semicircular canals

all the inner ear structures that convey impulses to the brain via the vestibular nerve.

semicircular canals saccule utricle

The somatic senses are those whose receptors are associated with which areas of the body?

skin, muscles, and joints

Senses whose receptors are in the skin, muscles, joints, or viscera are called _______ senses.

somatic

The chemoreceptors located on the tongue for the detection of taste are found in structures called

taste buds

The chemoreceptors that are responsible for the sense of taste are located mainly on the tongue in structures called

taste buds

Stereocilia are long, stiff, microvilli that are present on the hair cells of

the inner ear

Visual accommodation occurs when

the lens changes shape for close vision.

From the eye, the optic nerves enter and exit the optic chiasma, and continue as the optic

tract

humor function

transmit light rays and support the eye

optic nerve function

transmits impulses to the brain`

optic nerve

transmits impulses to the visual cortex

order as impulses would travel through them after leaving the eye. Start at the top.

1. optic nerve 2. optic chiasma 3. optic tracts 4. visual cortex

The middle layer of the eye with a dark pigment to absorb stray light is the

choroid

The shape of the lens changes for near or far vision due to the action of the __________ body.

ciliary

The structure of the eye responsible for changing the shape of the lens is the

ciliary body

An individual who has a genetic deficiency of one or more type of cone cells has _______ blindness.

color

The type of photoreceptor that is more concentrated in the center of the retina, allows for color vision and responds to bright light is called a ________ cell.

cone

he type of photoreceptor that is more concentrated in the center of the retina, allows for color vision and responds to bright light is called a _____ cell.

cone

The photoreceptors that allows fine detail and color of an object are the

cone cells

The receptors involved with detecting when the head moves in a vertical or horizontal direction are used for ___________ equilibrium.

gravitational

Select all structures that are components of the human middle ear.

ossicles auditory tube tympanic membrane

The opening in the front of the eye that is surrounded by the iris and through which light passes is the

pupil

a sensory _______ is cell that detect a specific type of stimulus

receptor(s)

Stimulation of pain receptors in an internal organ that is also felt in another area of the body is called __________ pain.

referred

When a person is having a heart attack, the pain originating in the heart muscle is often felt in the left shoulder and arm. This is called

referred pain

lens

refracts and focuses light rays

lens vision

refracts and focuses light rays

cornea function

refracts light rays

iris function

regulates light entrance

The light-absorbing pigment found in rods is

rhodopsin

The protein opsin and the molecule retinal combine to form the pigment found in rods called

rhodopsin

the protein opsin and the molecule retinal combine to form the pigment found in rods called

rhodopsin

components of rod cells of the retina.

rhodopsin embedded in disks inner and outer segments synaptic vesicles

A sensory receptor that consists of an outer segment joined to an inner segment by a short stalk, with pigment molecules embedded in the membrane of disks that make up the outer segment, is most likely a(n)

rod cell

The perception of a stimulus by the cerebral cortex is known as

sensation

When the cerebral cortex receives sensory information and consciously perceives it, this is called

sensation

humors

transmits light rays and support the eye

The nerve that carries impulses regarding equilibrium to the brain from the inner ear is called __________- nerve.

vestibular