Question 1

What disorder is characterized by a progressive,painless,loss of vision due to the clouding of the lens of the eye?
A) Glaucoma
B) Cataract
C) Presbyopia
D) Astigmatism

Accepted Answer

Cataract is a disorder characterized by a progressive, painless, loss of vision due to the clouding of the lens of the eye.

Question 2

Which term describes a decreased ability to accommodate between near and far vision with aging,resulting in difficulty seeing objects up close?
A) Tinnitus
B) Otoliths
C) Presbyopia
D) Sensorineural hearing loss

Accepted Answer

The ciliary muscles and suspensory ligaments are not as able to accommodate the shape of the lens with age, creating a condition called presbyopia.

Question 3

Which part of the retina has no photoreceptors and is therefore considered the blind spot?
A) Optic disc
B) Macula lutea
C) Fovea centralis
D) None of these answers are correct.

Accepted Answer

The optic disc is where blood vessels enter the eye and the axons forming the optic nerve leave the eye. It is located medially on the retina. There are no receptor cells at the optic disc so it is a functional blind spot. The macula lutea is located on the retina directly posterior to the center of the lens. The macula lutea has more cones than rods. The fovea centralis appears as a small depression in the center of the macula lutea. It contains only cones, so it is the area of sharpest vision. The rest of the retina contains a mixture of rods and cones, which allows you to see the color of objects focused anywhere in your field of vision whether you are looking directly at the object or not.

Question 4

What condition results if the cornea and lens focus the image ahead of the retina?
A) Myopia
B) Hyperopia
C) Farsightedness
D) None of these answers are correct.

Accepted Answer

If the cornea and lens focused the image ahead of the retina, the condition is called myopia (nearsightedness). If the cornea and lens focused the image behind the retina, the condition is called hyperopia (farsightedness).

Question 5

Which term describes a persistent abnormal ear noise,commonly experienced in the elderly due to mild hearing loss?
A) Tinnitus
B) Otoliths
C) Presbyopia
D) Sensorineural hearing loss

Accepted Answer

Tinnitus is the term used to describe a persistent abnormal ear noise, commonly experienced in the elderly due to mild hearing loss.

Question 6

What type of hearing loss is characterized by a problem with the organ of Corti or the auditory nerve?
A) Conductive hearing loss
B) Sensorineural hearing loss
C) Tinnitus
D) None of these answers are correct.

Accepted Answer

Conductive hearing loss is caused by a lesion in the outer or middle ear, preventing the proper conduction of vibrations to the inner ear. Sensorineural hearing loss is a problem with the organ of Corti or the auditory nerve.

Question 7

If a person cannot hear the sound produced by the tuning fork through the air but can hear the sound when the tuning fork is placed on the bone of the skull behind the ear,what type of hearing loss do they most likely have?
A) Conductive hearing loss
B) Sensorineural hearing loss
C) Both of these answers are correct.
D) Neither of these answers is correct.

Accepted Answer

Conductive and sensorineural hearing loss can be determined by testing hearing by air and bone conduction. A tuning fork is used in both tests. First, a vibrating tuning fork is placed close to the ear. Sound waves produced by the fork are received by the ear normally through the air to the outer ear, and then vibrations should be conducted to the middle ear. In the second test, the base of a vibrating tuning fork is placed on the bone of the skull behind the ear, causing the inner ear to vibrate directly. If the person cannot hear the sound produced by the tuning fork through the air, but can hear it when the tuning fork is placed on bone, it is not a problem with the organ of Corti or the auditory nerve. Instead, this indicates a conduction problem and conductive hearing loss. If the subject cannot hear in either case, it is sensorineural and possibly conductive hearing loss.

Question 8

What condition results if the cornea and lens focus the image behind the retina?
A) Myopia
B) Hyperopia
C) Nearsightedness
D) None of these answers are correct.

Accepted Answer

If the cornea and lens focused the image ahead of the retina, the condition is called myopia (nearsightedness). If the cornea and lens focused the image behind the retina, the condition is called hyperopia (farsightedness).

Question 9

Which test is used to diagnose color blindness?
A) Ishihara test
B) Rinne test
C) Weber test
D) Tonometry

Accepted Answer

The Ishihara test is used to diagnose color blindness.

Question 10

If a person cannot hear the sound produced by the tuning fork through the air or when the tuning fork is placed on the bone of the skull behind the ear,what type of hearing loss do they most likely have?
A) Conductive hearing loss
B) Sensorineural hearing loss
C) Both of these answers are correct.
D) Neither of these answers is correct.

Accepted Answer

Conductive and sensorineural hearing loss can be determined by testing hearing by air and bone conduction. A tuning fork is used in both tests. First, a vibrating tuning fork is placed close to the ear. Sound waves produced by the fork are received by the ear normally through the air to the outer ear, and then vibrations should be conducted to the middle ear. In the second test, the base of a vibrating tuning fork is placed on the bone of the skull behind the ear, causing the inner ear to vibrate directly. If the person cannot hear the sound produced by the tuning fork through the air, but can hear it when the tuning fork is placed on bone, it is not a problem with the organ of Corti or the auditory nerve. Instead, this indicates a conduction problem and conductive hearing loss. If the subject cannot hear in either case, it is sensorineural and possibly conductive hearing loss.

Question 11

What type of hearing loss is characterized by a lesion in the outer or middle ear,preventing the proper conduction of vibrations to the inner ear?
A) Conductive hearing loss
B) Sensorineural hearing loss
C) Tinnitus
D) None of these answers are correct.

Accepted Answer

Conductive hearing loss is caused by a lesion in the outer or middle ear, preventing the proper conduction of vibrations to the inner ear. Sensorineural hearing loss is a problem with the organ of Corti or the auditory nerve.

Question 12

Which test is used to diagnose hearing loss?
A) Ishihara test
B) Rinne test
C) Snellen test
D) Tonometry

Accepted Answer

The Rinne test is a procedure that uses a tuning fork to test for hearing loss.

Question 13

Which answer lists the pathway for vision in the correct order?
A) Both answers are correct.
B) Optic nerve - optic chiasm - optic tracts - thalamus - superior colliculi of the midbrain
C) Optic nerve - optic chiasm - optic tracts - thalamus - occipital lobe
D) None of these answers are correct.

Accepted Answer

The pathway for vision is optic nerve - optic chiasm - optic tracts - thalamus - occipital lobe. Some neurons carry the message to the superior colliculi of the midbrain as well.

Question 14

What cranial nerve is the optic nerve?
A) CN I
B) CN IX
C) CN II
D) CN X

Accepted Answer

CN II is the optic nerve.

Question 15

Which test is used to diagnose glaucoma?
A) Ishihara test
B) Rinne test
C) Weber test
D) Tonometry

Accepted Answer

Tonometry is a procedure that measures the pressure inside the eye. Glaucoma, or elevated ocular pressure may be diagnosed using this test.

Question 16

What type of hearing loss can be tested using a tuning fork?
A) Conductive hearing loss
B) Sensorineural hearing loss
C) Both of these answers are correct.
D) Neither of these answers is correct.

Accepted Answer

Conductive and sensorineural hearing loss can be determined by testing hearing by air and bone conduction. A tuning fork is used in both tests.

Quiz 8: The Nervous System-Senses

What disorder is characterized by a progressive,painless,loss of vision due to the clouding of the lens of the eye?

Which term describes a decreased ability to accommodate between near and far vision with aging,resulting in difficulty seeing objects up close?

Which part of the retina has no photoreceptors and is therefore considered the blind spot?

What condition results if the cornea and lens focus the image ahead of the retina?

Which term describes a persistent abnormal ear noise,commonly experienced in the elderly due to mild hearing loss?

What type of hearing loss is characterized by a problem with the organ of Corti or the auditory nerve?

If a person cannot hear the sound produced by the tuning fork through the air but can hear the sound when the tuning fork is placed on the bone of the skull behind the ear,what type of hearing loss do they most likely have?

What condition results if the cornea and lens focus the image behind the retina?

Which test is used to diagnose color blindness?

If a person cannot hear the sound produced by the tuning fork through the air or when the tuning fork is placed on the bone of the skull behind the ear,what type of hearing loss do they most likely have?

What type of hearing loss is characterized by a lesion in the outer or middle ear,preventing the proper conduction of vibrations to the inner ear?

Which test is used to diagnose hearing loss?

Which answer lists the pathway for vision in the correct order?

What cranial nerve is the optic nerve?

Which test is used to diagnose glaucoma?

What type of hearing loss can be tested using a tuning fork?