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