BIOD322
Module 4
LATEST EXAM READINESS
GUIDE
Q&S
©2024/2025
,1. Which of the following best describes the function of the
lateral geniculate nucleus (LGN) in visual processing?
A. Processing auditory signals
B. Integrating visual signals from both eyes
C. Processing olfactory stimuli
D. Managing vestibular sensory input
Correct Answer: B. Integrating visual signals from both
eyes
Rationale: The LGN is a relay center in the thalamus
for the visual pathway, responsible for receiving major
sensory input from the retina of the eye.
---
2. In the context of somatosensory pathways, which fibers
are responsible for transmitting fast pain and temperature
signals?
A. A-alpha fibers
B. C fibers
C. A-delta fibers
D. B fibers
Correct Answer: C. A-delta fibers
Rationale: A-delta fibers are myelinated, allowing for
faster conduction of sharp, acute pain and temperature
signals compared to the slower-conducting C fibers.
©2024/2025
, ---
3. What role does the cochlea's basilar membrane play in
auditory processing?
A. Converts sound waves into electrical signals
B. Transfers vibrations to the tympanic membrane
C. Separates sound frequencies spatially
D. Absorbs and dissipates sound energy
Correct Answer: C. Separates sound frequencies
spatially
Rationale: The basilar membrane varies in width and
stiffness along its length, enabling it to perform frequency
decomposition of incoming sounds through a process called
tonotopic mapping.
---
4. Which of the following best describes the phenomenon
of 'lateral inhibition' in the sensory systems?
A. Enhancement of sensory signals in low-light conditions
B. Suppression of neighboring neurons' activity to
sharpen stimulus perception
C. Random firing of sensory neurons to detect weak
stimuli
D. Integration of sensory information across modalities
Correct Answer: B. Suppression of neighboring neurons'
activity to sharpen stimulus perception
©2024/2025
Module 4
LATEST EXAM READINESS
GUIDE
Q&S
©2024/2025
,1. Which of the following best describes the function of the
lateral geniculate nucleus (LGN) in visual processing?
A. Processing auditory signals
B. Integrating visual signals from both eyes
C. Processing olfactory stimuli
D. Managing vestibular sensory input
Correct Answer: B. Integrating visual signals from both
eyes
Rationale: The LGN is a relay center in the thalamus
for the visual pathway, responsible for receiving major
sensory input from the retina of the eye.
---
2. In the context of somatosensory pathways, which fibers
are responsible for transmitting fast pain and temperature
signals?
A. A-alpha fibers
B. C fibers
C. A-delta fibers
D. B fibers
Correct Answer: C. A-delta fibers
Rationale: A-delta fibers are myelinated, allowing for
faster conduction of sharp, acute pain and temperature
signals compared to the slower-conducting C fibers.
©2024/2025
, ---
3. What role does the cochlea's basilar membrane play in
auditory processing?
A. Converts sound waves into electrical signals
B. Transfers vibrations to the tympanic membrane
C. Separates sound frequencies spatially
D. Absorbs and dissipates sound energy
Correct Answer: C. Separates sound frequencies
spatially
Rationale: The basilar membrane varies in width and
stiffness along its length, enabling it to perform frequency
decomposition of incoming sounds through a process called
tonotopic mapping.
---
4. Which of the following best describes the phenomenon
of 'lateral inhibition' in the sensory systems?
A. Enhancement of sensory signals in low-light conditions
B. Suppression of neighboring neurons' activity to
sharpen stimulus perception
C. Random firing of sensory neurons to detect weak
stimuli
D. Integration of sensory information across modalities
Correct Answer: B. Suppression of neighboring neurons'
activity to sharpen stimulus perception
©2024/2025
