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