Physiology IUPUI
IUPUI PHYSIOLOGY EXAM 3 STUDY
QUESTIONS AND ANSWERS GRADED
A+ 2025-2026
In sensory receptors, graded potentials are known as? -Correct Answers ✔-
Receptor potentials
The specific form of energy or signal that a sensory receptor is specialized to
detect and respond to. For example, light is the adequate stimulus for the
photoreceptors in the eyes -Correct Answers ✔-Adequate Stimulus
*IMPORTANT* Receptor Potentials must be strong enough to trigger an action
potential for a signal to be relayed to the brain. -Correct Answers ✔-
*IMPORTANT* Receptor Potentials must be strong enough to trigger an action
potential for a signal to be relayed to the brain.
The signal received by the individual receptor cells must be transduced to a signal
that can be relayed and understood by the brain -Correct Answers ✔-Coding
*IMPORTANT* Coding allows the central nervous system to determine the
duration of the original stimulus, the intensity of that stimulus, and the precise
location of that stimulus. -Correct Answers ✔-*IMPORTANT* Coding allows the
central nervous system to determine the duration of the original stimulus, the
intensity of that stimulus, and the precise location of that stimulus.
The ability of a sensory receptor to become less sensitive in the continued presence
of a stimulus is called? -Correct Answers ✔-Adaptation
*IMPORTANT* Adaptation is an important component of the sensory systems
because it allows our senses to adapt to a particular stimulus so that we can
continue to respond to new stimuli, rather than being overwhelmed by one
stimulus. -Correct Answers ✔-*IMPORTANT* Adaptation is an important
Physiology IUPUI
,Physiology IUPUI
component of the sensory systems because it allows our senses to adapt to a
particular stimulus so that we can continue to respond to new stimuli, rather than
being overwhelmed by one stimulus.
Three layers (tunic) of the eyes -Correct Answers ✔--Outer Fibrous Tunic
-Medial Vascular Tunic
-Inner Nervous Tunic
The first task of the eye (to capture and focus light) is accomplished by which
layers? -Correct Answers ✔-Outer Fibrous Tunic and Medial Vascular Tunic
Eyebrows, Eyelids, Eyelashes, Conjunctiva, Lacrimal apparatus, -Correct Answers
✔-Accessory Structures of the Eye
This is where the rod and cone photoreceptor cells are located -Correct Answers
✔-Retina
The tears drain from the eye at the corners via the ________and into the______ -
Correct Answers ✔-Lacrimal puncta, Lacrimal Sac
is the inflammation of the sclera and inner surface of the eyelid in response to a
viral or bacterial infection -Correct Answers ✔-Conjunctivitis
Often called the "white of the eye" and serves to protect and shape the eyeball, as
well as provide a site of attachment for the extrinsic muscles of the eye. -Correct
Answers ✔-Scerla
The choroid, ciliary body, and iris -Correct Answers ✔-The vascular or middle
tunic (or uvea) consist of
*IMPORTANT* Because it is highly vascularized, the medial vascular tunic
provides nutrient and gas exchange within the eye -Correct Answers ✔-
Physiology IUPUI
, Physiology IUPUI
*IMPORTANT* Because it is highly vascularized, the medial vascular tunic
provides nutrient and gas exchange within the eye
The size of the pupil is controlled by the intrinsic muscles of the eye, the
____________ and __________________ -Correct Answers ✔-The dilator
papillae and sphincter papillae
*IMPORTANT* The shape of the lens can change to adjust to the distance of the
image -Correct Answers ✔-*IMPORTANT* The shape of the lens can change to
adjust to the distance of the image
The adjusting of the lens so that you can see objects up close and far away -Correct
Answers ✔-Accommodation
Caused by increased intraocular pressure resulting from aqueous humor buildup -
Correct Answers ✔-Glaucoma
Loss of central vision, glare problems, difficult light adjustment -Correct Answers
✔-Macular Degeneration
Can see close objects clearly but distant objects appear blurry -Correct Answers ✔-
Myopia (nearsightedness)
*IMPORTANT* Myopia is caused by a focusing defect in the cornea or lens (they
refract the light too strongly) or by an eyeball whose length is too long. -Correct
Answers ✔-*IMPORTANT* Myopia is caused by a focusing defect in the cornea
or lens (they refract the light too strongly) or by an eyeball whose length is too
long.
Can see distant objects clearly, whereas close objects appear blurry. -Correct
Answers ✔-Hyperopia (farsightedness)
Physiology IUPUI
IUPUI PHYSIOLOGY EXAM 3 STUDY
QUESTIONS AND ANSWERS GRADED
A+ 2025-2026
In sensory receptors, graded potentials are known as? -Correct Answers ✔-
Receptor potentials
The specific form of energy or signal that a sensory receptor is specialized to
detect and respond to. For example, light is the adequate stimulus for the
photoreceptors in the eyes -Correct Answers ✔-Adequate Stimulus
*IMPORTANT* Receptor Potentials must be strong enough to trigger an action
potential for a signal to be relayed to the brain. -Correct Answers ✔-
*IMPORTANT* Receptor Potentials must be strong enough to trigger an action
potential for a signal to be relayed to the brain.
The signal received by the individual receptor cells must be transduced to a signal
that can be relayed and understood by the brain -Correct Answers ✔-Coding
*IMPORTANT* Coding allows the central nervous system to determine the
duration of the original stimulus, the intensity of that stimulus, and the precise
location of that stimulus. -Correct Answers ✔-*IMPORTANT* Coding allows the
central nervous system to determine the duration of the original stimulus, the
intensity of that stimulus, and the precise location of that stimulus.
The ability of a sensory receptor to become less sensitive in the continued presence
of a stimulus is called? -Correct Answers ✔-Adaptation
*IMPORTANT* Adaptation is an important component of the sensory systems
because it allows our senses to adapt to a particular stimulus so that we can
continue to respond to new stimuli, rather than being overwhelmed by one
stimulus. -Correct Answers ✔-*IMPORTANT* Adaptation is an important
Physiology IUPUI
,Physiology IUPUI
component of the sensory systems because it allows our senses to adapt to a
particular stimulus so that we can continue to respond to new stimuli, rather than
being overwhelmed by one stimulus.
Three layers (tunic) of the eyes -Correct Answers ✔--Outer Fibrous Tunic
-Medial Vascular Tunic
-Inner Nervous Tunic
The first task of the eye (to capture and focus light) is accomplished by which
layers? -Correct Answers ✔-Outer Fibrous Tunic and Medial Vascular Tunic
Eyebrows, Eyelids, Eyelashes, Conjunctiva, Lacrimal apparatus, -Correct Answers
✔-Accessory Structures of the Eye
This is where the rod and cone photoreceptor cells are located -Correct Answers
✔-Retina
The tears drain from the eye at the corners via the ________and into the______ -
Correct Answers ✔-Lacrimal puncta, Lacrimal Sac
is the inflammation of the sclera and inner surface of the eyelid in response to a
viral or bacterial infection -Correct Answers ✔-Conjunctivitis
Often called the "white of the eye" and serves to protect and shape the eyeball, as
well as provide a site of attachment for the extrinsic muscles of the eye. -Correct
Answers ✔-Scerla
The choroid, ciliary body, and iris -Correct Answers ✔-The vascular or middle
tunic (or uvea) consist of
*IMPORTANT* Because it is highly vascularized, the medial vascular tunic
provides nutrient and gas exchange within the eye -Correct Answers ✔-
Physiology IUPUI
, Physiology IUPUI
*IMPORTANT* Because it is highly vascularized, the medial vascular tunic
provides nutrient and gas exchange within the eye
The size of the pupil is controlled by the intrinsic muscles of the eye, the
____________ and __________________ -Correct Answers ✔-The dilator
papillae and sphincter papillae
*IMPORTANT* The shape of the lens can change to adjust to the distance of the
image -Correct Answers ✔-*IMPORTANT* The shape of the lens can change to
adjust to the distance of the image
The adjusting of the lens so that you can see objects up close and far away -Correct
Answers ✔-Accommodation
Caused by increased intraocular pressure resulting from aqueous humor buildup -
Correct Answers ✔-Glaucoma
Loss of central vision, glare problems, difficult light adjustment -Correct Answers
✔-Macular Degeneration
Can see close objects clearly but distant objects appear blurry -Correct Answers ✔-
Myopia (nearsightedness)
*IMPORTANT* Myopia is caused by a focusing defect in the cornea or lens (they
refract the light too strongly) or by an eyeball whose length is too long. -Correct
Answers ✔-*IMPORTANT* Myopia is caused by a focusing defect in the cornea
or lens (they refract the light too strongly) or by an eyeball whose length is too
long.
Can see distant objects clearly, whereas close objects appear blurry. -Correct
Answers ✔-Hyperopia (farsightedness)
Physiology IUPUI
