Portage Learning BIOD 152 A&P 2
Module 3 Exam 2025 updated
Question 1: Which portion of the eye supplies blood supply to other areas of the
eye?
A) Retina
B) Sclera
C) Choroid (of the middle layer)
D) Cornea
Correct Answer: C
Rationale: The choroid is a vascular layer containing blood vessels that nourish the
retina and other eye structures .
Question 2: The outer fibrous layer of the eye includes the:
A) Cornea and choroid
B) Sclera and cornea
C) Iris and pupil
D) Retina and cornea
Correct Answer: B
Rationale: The outer fibrous layer of the eye consists of the sclera (the white part) and
the cornea (the transparent front portion), providing shape and protection .
,Question 3: The posterior portion of the outer fibrous layer of the eye is called the:
A) Cornea
B) Retina
C) Sclera
D) Choroid
Correct Answer: C
Rationale: The sclera forms the outer protective white posterior portion of the eye .
Question 4: What is the correct order of how light passes through the eye?
A) Cornea, lens, pupil, retina
B) Cornea, lens, vitreous fluid, retina
C) Lens, retina, cornea, optic nerve
D) Lens, vitreous fluid, optic nerve, retina
Correct Answer: B
Rationale: Light passes first through the cornea, then the lens, through the vitreous
humor (fluid), and finally reaches the retina where photoreceptors are located .
Question 5: True or False: Cones operate best in dim light.
A) True
B) False
,Correct Answer: B
Rationale: Cones operate best in bright light and are responsible for color vision. Rods
operate best in dim light .
Question 6: 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?
A) Right optic nerve
B) Left lateral geniculate nucleus (LGN)
C) Right optic tract
D) Occipital lobe
Correct Answer: B
Rationale: Visual information from the right visual fields of both eyes crosses at the
optic chiasm and travels to the left side of the brain. Damage to the left LGN interrupts
this pathway, causing right visual field blindness .
Question 7: A patient is found to have blindness in the right eye. What part of the
vision pathway was most likely damaged?
A) Optic chiasm
B) Occipital lobe
C) Left optic nerve
D) Right optic nerve
Correct Answer: D
Rationale: The optic nerve carries all visual information from one eye before the optic
, chiasm. Damage here causes blindness in the affected eye (right), including peripheral
and nasal fields .
Question 8: True or False: The lateral fibers of the optic nerves cross at the optic
chiasm.
A) True
B) False
Correct Answer: B
Rationale: Only the medial (nasal) fibers cross at the optic chiasm; lateral (temporal)
fibers remain on the same side .
Question 9: The _______ is controlled by the abducens nerve.
A) Medial rectus
B) Superior oblique
C) Lateral rectus
D) Inferior rectus
Correct Answer: C
Rationale: The abducens nerve (cranial nerve VI) innervates the lateral rectus muscle,
which abducts the eye (moves it laterally) .
Module 3 Exam 2025 updated
Question 1: Which portion of the eye supplies blood supply to other areas of the
eye?
A) Retina
B) Sclera
C) Choroid (of the middle layer)
D) Cornea
Correct Answer: C
Rationale: The choroid is a vascular layer containing blood vessels that nourish the
retina and other eye structures .
Question 2: The outer fibrous layer of the eye includes the:
A) Cornea and choroid
B) Sclera and cornea
C) Iris and pupil
D) Retina and cornea
Correct Answer: B
Rationale: The outer fibrous layer of the eye consists of the sclera (the white part) and
the cornea (the transparent front portion), providing shape and protection .
,Question 3: The posterior portion of the outer fibrous layer of the eye is called the:
A) Cornea
B) Retina
C) Sclera
D) Choroid
Correct Answer: C
Rationale: The sclera forms the outer protective white posterior portion of the eye .
Question 4: What is the correct order of how light passes through the eye?
A) Cornea, lens, pupil, retina
B) Cornea, lens, vitreous fluid, retina
C) Lens, retina, cornea, optic nerve
D) Lens, vitreous fluid, optic nerve, retina
Correct Answer: B
Rationale: Light passes first through the cornea, then the lens, through the vitreous
humor (fluid), and finally reaches the retina where photoreceptors are located .
Question 5: True or False: Cones operate best in dim light.
A) True
B) False
,Correct Answer: B
Rationale: Cones operate best in bright light and are responsible for color vision. Rods
operate best in dim light .
Question 6: 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?
A) Right optic nerve
B) Left lateral geniculate nucleus (LGN)
C) Right optic tract
D) Occipital lobe
Correct Answer: B
Rationale: Visual information from the right visual fields of both eyes crosses at the
optic chiasm and travels to the left side of the brain. Damage to the left LGN interrupts
this pathway, causing right visual field blindness .
Question 7: A patient is found to have blindness in the right eye. What part of the
vision pathway was most likely damaged?
A) Optic chiasm
B) Occipital lobe
C) Left optic nerve
D) Right optic nerve
Correct Answer: D
Rationale: The optic nerve carries all visual information from one eye before the optic
, chiasm. Damage here causes blindness in the affected eye (right), including peripheral
and nasal fields .
Question 8: True or False: The lateral fibers of the optic nerves cross at the optic
chiasm.
A) True
B) False
Correct Answer: B
Rationale: Only the medial (nasal) fibers cross at the optic chiasm; lateral (temporal)
fibers remain on the same side .
Question 9: The _______ is controlled by the abducens nerve.
A) Medial rectus
B) Superior oblique
C) Lateral rectus
D) Inferior rectus
Correct Answer: C
Rationale: The abducens nerve (cranial nerve VI) innervates the lateral rectus muscle,
which abducts the eye (moves it laterally) .
