Anatomy Ch. 10
A cataract is a condition in which the cornea becomes less transparent and "milky" in appearance.
False
Dilation of the pupil is caused by the contraction of circular fibers of the iris.
False
If the circular iris muscles are contracted, the rods of the eye are probably being used to see.
False
In very dim light the circular fibers of the iris contract, causing the pupil to dilate.
False
The nerve impulse of the eye begins when light enters the pupil of the eye and ends in the occipital lobe of the brain. This is called the visual pathway.
False
The farsightedness of old age is called
Presbyopia
The Golgi tendon receptors can be classified as
Proprioception
The eardrum is
also called the tympanic membrane
The cones of the eye
are part of the retina and also respond to red, green, and blue
The external ear is called the
auricle or pinna
The perilymph is inside the
bony labyrinth
Aqueous humor is the watery fluid in the posterior of the eye.
false
General sense organs are characterized by large complex organs or localized groupings or specialized receptors.
false
General sense organs are found throughout the body but are most concentrated in the internal organs.
false
In bright light, the iris muscles would tend to contract.
false
Meissner's corpuscles respond to pain.
false
Only special sense organs can be classified as encapsulated.
false
Papillae are microscopic receptors that can be found on the taste buds.
false
Sensations of touch and pain are usually generated by the special senses.
false
Specialized receptors found near the point of junction between tendons and muscles are called mechanoreceptors.
false
The conjunctiva is the clear part of the sclera of the eye.
false
The external acoustic canal connects the throat to the middle ear and can allow the spread of infection from the throat to the middle ear.
false
The function of the lacrimal gland is to produce aqueous humor for the interior of the eye.
false
The handle of the incus attaches to the inside of the eardrum.
false
The iris is considered part of the sclera.
false
The malleus rest against the oval window of the middle ear and helps transmit vibrations.
false
The nerve impulse of the eye begins when light enters through the iris and ends in the occipital lobe of the brain. This is called a visual pathway.
false
The optic disc is able to respond to only bright light.
false
The pupil is the colored part of the eye.
false
The root hair plexuses are associated with deep pressure and vibration.
false
The sensory pathway for proprioceptors passes through the thalamus.
false
The tympanic membrane is considered the organ of hearing.
false
There are only six taste sensations.
false
Glaucoma occurs when too much vitreous humor builds up in the eye.
false (aqueous humor)
Presbyopia is a term for the nearsightedness of old age.
false (farsightedness)
The greatest concentration of rods is found in the macula lutea.
false (fovea centralis)
The yellowish area near the center of the retina is called the fovea centralis.
false (macula lutea)
There are three kinds of cones, each sensitive to a different color: red, yellow, or blue.
false (red, green, blue)
The potentially blinding condition called glaucoma can occur if the fluid pressure of the eye drops too low.
false (too high of pressure)
pain, temperature, touch, pressure, and body position
general senses
The sequence of the ossicles from the eardrum to the inner ear is
malleus, incus, stapes
The sense of balance is classified as a
mechanoreceptor
The sense of hearing can be classified as a
mechanoreceptor
Endolymph is inside the
membranous labyrinth
The specific organ of hearing is called the
organ of Corti
An infection of the middle ear is called
otitis media
The structure that separates the middle ear from the inner ear is the
oval window
The free nerve endings in the skin respond to
pain, crude touch, temperature, itch, and tickle
The sense of balance occurs in the
semicircular canals and the vestibule
The vestibular nerve contains the nerve from the
semicircular canals and the vestibule
The sense of sight can be classified as a
special sense
smell, taste, vision, hearing, and equilibrium
special senses
In the middle ear, the
stapes rests against the oval window.
Astigmatism is caused by an eyeball that is too elongated.
true
Cataracts may be caused by exposure to the ultraviolet radiation of the sun.
true
Colorblindness is a malfunction of the cones of the eye.
true
Cones are used for day vision or in bright light.
true
Dilation of the pupil is caused by the contraction of the iris.
true
Dim light is able to stimulate the rods in the eye.
true
Equilibrium, temperature, and pressure are sensations generated by general sense organs.
true
General senses are evenly distributed over the surface of the body.
true
Going from most external to most internal, the layers of the eye would be sclera, choroid, and retina.
true
Golgi tendon receptors and muscle spindles are both proprioceptors but are able to sense different things.
true
Gustatory cells are responsible for the sense of taste.
true
If the eyeball is too short, a condition called hyperopia, or farsightedness, can exist.
true
If the iris muscles are contracted the rods of the eye are probably being used to see.
true
Infections in the throat can cause otitis media by moving through the eustachian tube.
true
Lasers can be used to sculpt the lens to help treat cataracts.
true
Looking directly at an object in bright light would give us greater visual acuity because light would be focused on the fovea centralis.
true
Most of the free nerve endings are found in the epithelial layers of the body.
true
Muscle spindles can be classified as proprioceptors.
true
Myopia is another name for nearsightedness.
true
One of the functions of the fluids in the eye is to focus on light.
true
One of the main functions of a sense organ is to change a physical stimulus into an electrical signal.
true
Only general sense organs are classified as either encapsulated or unencapsulated.
true
Pacinian corpuscles respond to deep pressure.
true
Ruffini's corpuscles respond to touch and pressure.
true
Senses can react to changes in both our internal and external environment.
true
Specialized cells on the tongue called taste buds provide the sense of taste.
true
The bony labyrinth is divided into three parts: the cochlea, the vestibule, and the semicircular canals.
true
The ceruminous glands produce ear wax.
true
The ciliary muscle affects the eye's ability to focus.
true
The cornea is considered part of the sclera.
true
The crista ampullaris is stimulated when you move your head.
true
The highest concentration of general sense organs is in the epidermis of the skin.
true
The iris is actually a muscle in the choroid layer.
true
The lacrimal gland produces tears that keep the eyes moist.
true
The membranous labyrinth is filled with endolymph.
true
The organ of Corti is considered the organ of hearing.
true
The ossicles are in the middle ear.
true
The ossicles are named based on their shape.
true
The retina is the innermost layer of the eye.
true
The sensory pathway for both proprioceptors and cutaneous receptors passes through the spinal cord.
true
The sensory pathway for proprioceptors passes through the cerebellum.
true
The stapes presses against the oval window.
true
The vestibular nerve joins with the cochlear nerve to and from cranial nerve VIII.
true
Vitreous humor is the thick fluid in the posterior chamber of the eye.
true
You are able to distinguish the difference between lifting a 20-lb weight and a 50-lb weight because of the Golgi tendon receptors.
true
The inner ear is responsible for the sense of hearing and equilibrium.
true (?)
The inner ear consists of three spaces, which are the
vestibule, semicircular canals, and the cochlea