,BIOD 152 Module 3 | Practice Q&A | 2026/2027 | Anatomy | Portage
Learning
1. What sense does NOT have specialized sense organs?
A) Vision
B) Hearing
C) Touch
D) Taste
Correct Answer: Touch
Rationale: Touch does not have specialized sense organs; it uses general
receptors distributed throughout the skin. Vision uses eyes, hearing uses
ears, and taste uses taste buds as specialized organs .
2. The posterior portion of the outer fibrous layer of the eye is called the:
A) Cornea
B) Sclera
C) Choroid
D) Retina
Correct Answer: Sclera
Rationale: The outer fibrous layer of the eye consists of the sclera (posterior,
white portion) and the cornea (anterior, transparent portion). The sclera
provides shape and protection to the eye .
3. The middle layer of the eye includes which regions?
A) Sclera and cornea
,B) Retina and optic nerve
C) Ciliary body and iris
D) Conjunctiva and lens
Correct Answer: Ciliary body and iris
Rationale: The middle (vascular) layer of the eye includes the choroid, ciliary
body, and iris. The ciliary body controls lens shape, and the iris regulates
pupil diameter. The outer layer is sclera/cornea, and the inner layer is the
retina .
4. Which portion of the eye supplies blood supply to the other layers of the
eye?
A) Retina
B) Sclera
C) Choroid (of the middle layer)
D) Cornea
Correct Answer: Choroid (of the middle layer)
Rationale: The choroid is a highly vascular layer of the eye that supplies
blood to the retina and other eye structures. It is located between the sclera
and the retina .
5. True or False: The more numerous type of photoreceptors are rods.
A) True
B) False
Correct Answer: True
, Rationale: Rods are the more numerous type of photoreceptor in the human
retina. They function best in dim light and do not perceive color. Cones are
less numerous but are responsible for color vision and high visual acuity in
bright light .
6. True or False: Cones operate best in dim light.
A) True
B) False
Correct Answer: False
Rationale: Cones are photoreceptors that function best in bright light and are
responsible for color vision and high visual acuity. Rods are the
photoreceptors that operate best in dim light .
7. What is the correct order of how light passes through the eye?
A) Cornea, lens, vitreous fluid, retina
B) Lens, cornea, vitreous fluid, retina
C) Cornea, vitreous fluid, lens, retina
D) Retina, lens, vitreous fluid, cornea
Correct Answer: Cornea, lens, vitreous fluid, retina
Rationale: Light passes first through the cornea, then through the lens,
through the vitreous humor (fluid filling the posterior cavity), and finally
reaches the retina where photoreceptors are located and signal transduction
occurs .
Learning
1. What sense does NOT have specialized sense organs?
A) Vision
B) Hearing
C) Touch
D) Taste
Correct Answer: Touch
Rationale: Touch does not have specialized sense organs; it uses general
receptors distributed throughout the skin. Vision uses eyes, hearing uses
ears, and taste uses taste buds as specialized organs .
2. The posterior portion of the outer fibrous layer of the eye is called the:
A) Cornea
B) Sclera
C) Choroid
D) Retina
Correct Answer: Sclera
Rationale: The outer fibrous layer of the eye consists of the sclera (posterior,
white portion) and the cornea (anterior, transparent portion). The sclera
provides shape and protection to the eye .
3. The middle layer of the eye includes which regions?
A) Sclera and cornea
,B) Retina and optic nerve
C) Ciliary body and iris
D) Conjunctiva and lens
Correct Answer: Ciliary body and iris
Rationale: The middle (vascular) layer of the eye includes the choroid, ciliary
body, and iris. The ciliary body controls lens shape, and the iris regulates
pupil diameter. The outer layer is sclera/cornea, and the inner layer is the
retina .
4. Which portion of the eye supplies blood supply to the other layers of the
eye?
A) Retina
B) Sclera
C) Choroid (of the middle layer)
D) Cornea
Correct Answer: Choroid (of the middle layer)
Rationale: The choroid is a highly vascular layer of the eye that supplies
blood to the retina and other eye structures. It is located between the sclera
and the retina .
5. True or False: The more numerous type of photoreceptors are rods.
A) True
B) False
Correct Answer: True
, Rationale: Rods are the more numerous type of photoreceptor in the human
retina. They function best in dim light and do not perceive color. Cones are
less numerous but are responsible for color vision and high visual acuity in
bright light .
6. True or False: Cones operate best in dim light.
A) True
B) False
Correct Answer: False
Rationale: Cones are photoreceptors that function best in bright light and are
responsible for color vision and high visual acuity. Rods are the
photoreceptors that operate best in dim light .
7. What is the correct order of how light passes through the eye?
A) Cornea, lens, vitreous fluid, retina
B) Lens, cornea, vitreous fluid, retina
C) Cornea, vitreous fluid, lens, retina
D) Retina, lens, vitreous fluid, cornea
Correct Answer: Cornea, lens, vitreous fluid, retina
Rationale: Light passes first through the cornea, then through the lens,
through the vitreous humor (fluid filling the posterior cavity), and finally
reaches the retina where photoreceptors are located and signal transduction
occurs .
