module 3 biod 152 questions and answers
What sense does not have specialized sense organs?
Smell
Touch
Equilibrium
A&C - correct answer touch
The outer fibrous layer of the eye includes the:
A. Sclera and cornea
B. Ciliary body and iris
C. Pupil and retina
D. Lens and vitreous fluid - correct answer A
What portion of the eye supplies blood supply to the other layers of the eye? - correct answer choroid
True or false: The more numerous type of photoreceptors are rods - correct answer True
A patient is found to have blindness of the right visual field of both eyes. What part of the vision
pathway was most likely damaged? Explain your response.
A. Left optic nerve
B. Right optic nerve
C. Left LGN
D. Right LGN - correct answer C; All the sensory information from the right visual fields travels
A patient has a brain tumor in the area indicated by the red x in the figure, below. What type of
blindness is the patient most likely to incur? Explain your reasoning. (PICTURE)
, A. Left eye blindness
B. Right eye blindness
C. Bilateral left visual field blindness
D. Bilateral right visual field blindness. - correct answer A Left eye blindness because there is damage to
the left optic nerve. Information from the left visual field has not yet crossed at the optic chiasm. Both
peripheral and nasal fields of the left eye would be missing
True or False: The lateral fibers of the optic nerves cross at the optic chiasm. - correct answer False
The ________ is controlled by the trochlear nerve.
A. Superior rectus
B. Medial rectus
C. Lateral rectus
D. Superior oblique - correct answer D
Your elderly patient is discussing her vision problems. She describes her vision as blurry. Following a
visual examination, her left eye deviates medially when looking straight ahead. What is most likely
causing the vision problem? Explain your reasoning.
A. Cataracts
B. Abducens nerve damage
C. Brain tumor in the occipital lobe
D. Medial rectus damage
E. Superior rectus damage - correct answer B The abducens nerve controls the lateral rectus. Damage to
the lateral rectus would cause there to be a muscle imbalance, and the medial rectus would pull the eye
medially when looking straight ahead, causing blurry vision. (Diplopia)
Which of the following statements is false regarding the external ear?
A. The lobule does not contain cartilage.
B. The auricle funnels sound into the external acoustic meatus.
C. The helix contains cartilage.
What sense does not have specialized sense organs?
Smell
Touch
Equilibrium
A&C - correct answer touch
The outer fibrous layer of the eye includes the:
A. Sclera and cornea
B. Ciliary body and iris
C. Pupil and retina
D. Lens and vitreous fluid - correct answer A
What portion of the eye supplies blood supply to the other layers of the eye? - correct answer choroid
True or false: The more numerous type of photoreceptors are rods - correct answer True
A patient is found to have blindness of the right visual field of both eyes. What part of the vision
pathway was most likely damaged? Explain your response.
A. Left optic nerve
B. Right optic nerve
C. Left LGN
D. Right LGN - correct answer C; All the sensory information from the right visual fields travels
A patient has a brain tumor in the area indicated by the red x in the figure, below. What type of
blindness is the patient most likely to incur? Explain your reasoning. (PICTURE)
, A. Left eye blindness
B. Right eye blindness
C. Bilateral left visual field blindness
D. Bilateral right visual field blindness. - correct answer A Left eye blindness because there is damage to
the left optic nerve. Information from the left visual field has not yet crossed at the optic chiasm. Both
peripheral and nasal fields of the left eye would be missing
True or False: The lateral fibers of the optic nerves cross at the optic chiasm. - correct answer False
The ________ is controlled by the trochlear nerve.
A. Superior rectus
B. Medial rectus
C. Lateral rectus
D. Superior oblique - correct answer D
Your elderly patient is discussing her vision problems. She describes her vision as blurry. Following a
visual examination, her left eye deviates medially when looking straight ahead. What is most likely
causing the vision problem? Explain your reasoning.
A. Cataracts
B. Abducens nerve damage
C. Brain tumor in the occipital lobe
D. Medial rectus damage
E. Superior rectus damage - correct answer B The abducens nerve controls the lateral rectus. Damage to
the lateral rectus would cause there to be a muscle imbalance, and the medial rectus would pull the eye
medially when looking straight ahead, causing blurry vision. (Diplopia)
Which of the following statements is false regarding the external ear?
A. The lobule does not contain cartilage.
B. The auricle funnels sound into the external acoustic meatus.
C. The helix contains cartilage.
