BIOD 322 - Neuroscience Module 3 Exam: CNS Structure
and Functional Anatomy 2026/2027 UPDATE UPDATED
ACTUAL Questions and CORRECT Answers
1. Which of the following layers of the meninges is the most superficial and
consists of a thick, fibrous connective tissue?
A. Dura mater
B. Arachnoid mater
C. Pia mater
D. Subarachnoid space
Answer: A
Rationale: The dura mater is the outermost, toughest layer of the meninges, providing
primary protection for the brain and spinal cord.
2. Where is the cerebrospinal fluid (CSF) primarily produced within the
ventricular system?
A. Arachnoid granulations
B. Corpus callosum
C. Cerebral aqueduct
D. Choroid plexus
Answer: D
Rationale: The choroid plexus is a network of capillaries and ependymal cells located in
the ventricles that filters blood to produce CSF.
,3. The central sulcus separates which two lobes of the cerebrum?
A. Frontal and Parietal
B. Parietal and Occipital
C. Frontal and Temporal
D. Temporal and Occipital
Answer: A
Rationale: The central sulcus is a prominent landmark that serves as the boundary
between the frontal lobe (motor) and the parietal lobe (sensory).
4. Damage to Broca’s area, located in the left frontal lobe, most likely results in
which deficit?
A. Inability to produce fluent speech
B. Inability to understand spoken language
C. Loss of vision in the right eye
D. Impaired coordination of fine motor skills
Answer: A
Rationale: Broca’s area is responsible for motor speech production; damage leads to
expressive aphasia where the patient struggles to speak fluently.
5. The primary somatosensory cortex is located on which specific gyrus?
A. Postcentral gyrus
B. Superior temporal gyrus
C. Precentral gyrus
D. Cingulate gyrus
Answer: A
Rationale: The postcentral gyrus in the parietal lobe contains the primary somatosensory
cortex, which processes tactile information.
, 6. Which structure acts as the main relay station for nearly all sensory
information traveling to the cerebral cortex?
A. Hypothalamus
B. Thalamus
C. Basal ganglia
D. Hippocampus
Answer: B
Rationale: The thalamus filters and directs sensory signals (except olfaction) to the
appropriate functional areas of the cortex.
7. The hypothalamus is primarily responsible for which of the following
functions?
A. Storing long-term declarative memories
B. Coordinating complex voluntary muscle movements
C. Processing visual information from the retina
D. Maintaining homeostasis and regulating the endocrine system
Answer: D
Rationale: The hypothalamus regulates temperature, hunger, thirst, and sleep, and
controls the pituitary gland to maintain homeostasis.
8. Which part of the brainstem contains the ‘pyramids’ where decussation of
motor fibers occurs?
A. Midbrain
B. Medulla Oblongata
C. Pons
D. Thalamus
Answer: B
Rationale: The medulla oblongata features the pyramids, where approximately 90% of the
corticospinal tract fibers cross to the opposite side.
and Functional Anatomy 2026/2027 UPDATE UPDATED
ACTUAL Questions and CORRECT Answers
1. Which of the following layers of the meninges is the most superficial and
consists of a thick, fibrous connective tissue?
A. Dura mater
B. Arachnoid mater
C. Pia mater
D. Subarachnoid space
Answer: A
Rationale: The dura mater is the outermost, toughest layer of the meninges, providing
primary protection for the brain and spinal cord.
2. Where is the cerebrospinal fluid (CSF) primarily produced within the
ventricular system?
A. Arachnoid granulations
B. Corpus callosum
C. Cerebral aqueduct
D. Choroid plexus
Answer: D
Rationale: The choroid plexus is a network of capillaries and ependymal cells located in
the ventricles that filters blood to produce CSF.
,3. The central sulcus separates which two lobes of the cerebrum?
A. Frontal and Parietal
B. Parietal and Occipital
C. Frontal and Temporal
D. Temporal and Occipital
Answer: A
Rationale: The central sulcus is a prominent landmark that serves as the boundary
between the frontal lobe (motor) and the parietal lobe (sensory).
4. Damage to Broca’s area, located in the left frontal lobe, most likely results in
which deficit?
A. Inability to produce fluent speech
B. Inability to understand spoken language
C. Loss of vision in the right eye
D. Impaired coordination of fine motor skills
Answer: A
Rationale: Broca’s area is responsible for motor speech production; damage leads to
expressive aphasia where the patient struggles to speak fluently.
5. The primary somatosensory cortex is located on which specific gyrus?
A. Postcentral gyrus
B. Superior temporal gyrus
C. Precentral gyrus
D. Cingulate gyrus
Answer: A
Rationale: The postcentral gyrus in the parietal lobe contains the primary somatosensory
cortex, which processes tactile information.
, 6. Which structure acts as the main relay station for nearly all sensory
information traveling to the cerebral cortex?
A. Hypothalamus
B. Thalamus
C. Basal ganglia
D. Hippocampus
Answer: B
Rationale: The thalamus filters and directs sensory signals (except olfaction) to the
appropriate functional areas of the cortex.
7. The hypothalamus is primarily responsible for which of the following
functions?
A. Storing long-term declarative memories
B. Coordinating complex voluntary muscle movements
C. Processing visual information from the retina
D. Maintaining homeostasis and regulating the endocrine system
Answer: D
Rationale: The hypothalamus regulates temperature, hunger, thirst, and sleep, and
controls the pituitary gland to maintain homeostasis.
8. Which part of the brainstem contains the ‘pyramids’ where decussation of
motor fibers occurs?
A. Midbrain
B. Medulla Oblongata
C. Pons
D. Thalamus
Answer: B
Rationale: The medulla oblongata features the pyramids, where approximately 90% of the
corticospinal tract fibers cross to the opposite side.
