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BIO 141 chapter 15 Questions and Answers
(100% Correct Answers)
If a chalazion interferes with glandular secretion, the immediate outcome would be
______.
Ans: friction on the anterior surface of the eye
Conjunctivitis does not directly affect ______.
Ans: the conjunctival sac
When a person's cold is accompanied by "watery eyes," there is reduced flow of
lacrimal fluid directly into the ______.
Ans: lacrimal puncta
Which of the following nerves would you predict is NEVER involved in the
development of strabismus?
Ans: trigeminal (V)
If retinal detachment occurs in the macula lutea, one can predict that there would be
a significant loss of ______.
Ans: color vision
In glaucoma, damage occurs primarily to the ______.
Ans: ganglion cells in the retina
In theory, cataracts could be prevented by invention of a treatment that would ______.
Ans: increase diffusion rates within the lenses
Which of the following statements is true?
Ans: Contraction of the ciliary muscles is required for hyperopic individuals to
clearly see distant objects.
In a 30 year old man who has red-green color blindness, light having a wavelength of
530 nm is perceived as being green. This man ______.
Ans: perceives that red light has a green color
Which of the following statements is FALSE?
Ans: Nyctalopia affects vision in the fovea centralis, resulting in impaired vision.
If the optic chiasma is destroyed but the rest of the visual pathway to the brain is not
damaged, the result would be ______.
Ans: loss of peripheral vision on both the far right and far left sides of the visual
field
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The mucous membrane that lines the eyelids and is reflected over the anterior
surface of the eyeball is the conjunctiva.
Ans: True
The photoreceptor cells are sensitive to damage from light.
Ans: True
The optic disc is the location where the optic nerve leaves the eyeball.
Ans: True
The extrinsic eye muscle motor units contain only 8 to 12 muscle cells and in some
cases as few as 2 or 3 muscle cells.
Ans: True
The bending of light rays is called reflection.
Ans: False
The anterior chamber of the eye is filled with vitreous humor.
Ans: False
The neural layer of the retina prevents excessive scattering of light within the eye.
Ans: False
Light passes through the entire thickness of the neural layer of the retina to excite
the photoreceptors.
Ans: True
Contraction of the ciliary muscle causes the lens to bend the light less.
Ans: False
When we move from darkness to bright light, retinal sensitivity is lost, but visual
acuity is gained.
Ans: True
The function of the lens of the eye is to allow precise focusing of light on the retina.
Ans: True
What is the main function of the rods in the eye?
Ans: vision in dim light
What structure regulates the amount of light passing to the visual receptors of the
eye?
Ans: iris
Farsightedness is more properly called ________.
Ans: hyperopia
BIO 141 chapter 15 Questions and Answers
(100% Correct Answers)
If a chalazion interferes with glandular secretion, the immediate outcome would be
______.
Ans: friction on the anterior surface of the eye
Conjunctivitis does not directly affect ______.
Ans: the conjunctival sac
When a person's cold is accompanied by "watery eyes," there is reduced flow of
lacrimal fluid directly into the ______.
Ans: lacrimal puncta
Which of the following nerves would you predict is NEVER involved in the
development of strabismus?
Ans: trigeminal (V)
If retinal detachment occurs in the macula lutea, one can predict that there would be
a significant loss of ______.
Ans: color vision
In glaucoma, damage occurs primarily to the ______.
Ans: ganglion cells in the retina
In theory, cataracts could be prevented by invention of a treatment that would ______.
Ans: increase diffusion rates within the lenses
Which of the following statements is true?
Ans: Contraction of the ciliary muscles is required for hyperopic individuals to
clearly see distant objects.
In a 30 year old man who has red-green color blindness, light having a wavelength of
530 nm is perceived as being green. This man ______.
Ans: perceives that red light has a green color
Which of the following statements is FALSE?
Ans: Nyctalopia affects vision in the fovea centralis, resulting in impaired vision.
If the optic chiasma is destroyed but the rest of the visual pathway to the brain is not
damaged, the result would be ______.
Ans: loss of peripheral vision on both the far right and far left sides of the visual
field
, 2 Inquire through: | Professional | Confidential Support
The mucous membrane that lines the eyelids and is reflected over the anterior
surface of the eyeball is the conjunctiva.
Ans: True
The photoreceptor cells are sensitive to damage from light.
Ans: True
The optic disc is the location where the optic nerve leaves the eyeball.
Ans: True
The extrinsic eye muscle motor units contain only 8 to 12 muscle cells and in some
cases as few as 2 or 3 muscle cells.
Ans: True
The bending of light rays is called reflection.
Ans: False
The anterior chamber of the eye is filled with vitreous humor.
Ans: False
The neural layer of the retina prevents excessive scattering of light within the eye.
Ans: False
Light passes through the entire thickness of the neural layer of the retina to excite
the photoreceptors.
Ans: True
Contraction of the ciliary muscle causes the lens to bend the light less.
Ans: False
When we move from darkness to bright light, retinal sensitivity is lost, but visual
acuity is gained.
Ans: True
The function of the lens of the eye is to allow precise focusing of light on the retina.
Ans: True
What is the main function of the rods in the eye?
Ans: vision in dim light
What structure regulates the amount of light passing to the visual receptors of the
eye?
Ans: iris
Farsightedness is more properly called ________.
Ans: hyperopia
