BIOL251 Human Anatomy & Physiology I w Lab 2026 Module 6 Exam Review
Questions and Answers Summary LockDown Browser |Portage Learning.
BIOL251 Module 6 Exam Review: Nervous System
1. Which structure connects the right and left cerebral hemispheres?
a) Corpus striatum
b) Corpus callosum
c) Septum pellucidum
d) Cerebral aqueduct
Answer: b) Corpus callosum
Rationale: The corpus callosum is a large, C-shaped bundle of nerve fibers that
allows communication between the left and right cerebral hemispheres.
2. The primary motor cortex is located in which lobe of the brain?
a) Parietal lobe
b) Temporal lobe
c) Occipital lobe
d) Frontal lobe
,Answer: d) Frontal lobe
Rationale: The precentral gyrus of the frontal lobe houses the primary motor
cortex, which is responsible for voluntary movement.
3. Which lobe processes auditory information and houses the primary auditory
cortex?
a) Frontal lobe
b) Parietal lobe
c) Temporal lobe
d) Insula
Answer: c) Temporal lobe
Rationale: The temporal lobe is involved in hearing, language comprehension, and
memory retrieval.
4. Which part of the brainstem regulates heart rate and breathing?
a) Pons
b) Midbrain
c) Medulla oblongata
,d) Cerebellum
Answer: c) Medulla oblongata
Rationale: The medulla oblongata contains vital centers that control autonomic
functions such as heart rate, blood pressure, and respiration.
5. What is the primary function of the cerebellum?
a) Visual processing
b) Coordination of movement and balance
c) Relaying sensory information
d) Regulating hunger
Answer: b) Coordination of movement and balance
Rationale: The cerebellum compares intended movements with actual
movements and makes adjustments for coordination, fine-tuning motor activity,
and maintaining balance.
6. Which type of fiber carries sensory information toward the central nervous
system?
a) Efferent fibers
, b) Motor fibers
c) Afferent fibers
d) Descending fibers
Answer: c) Afferent fibers
Rationale: Afferent (sensory) neurons carry impulses from sensory receptors to
the CNS. Efferent neurons carry commands away from the CNS to effectors.
7. Which ion is primarily responsible for the depolarization phase of an action
potential?
a) Potassium (K⁺)
b) Calcium (Ca²⁺)
c) Chloride (Cl⁻)
d) Sodium (Na⁺)
Answer: d) Sodium (Na⁺)
Rationale: When voltage-gated sodium channels open, Na⁺ rushes into the cell
down its electrochemical gradient, making the inside less negative
(depolarization).
Questions and Answers Summary LockDown Browser |Portage Learning.
BIOL251 Module 6 Exam Review: Nervous System
1. Which structure connects the right and left cerebral hemispheres?
a) Corpus striatum
b) Corpus callosum
c) Septum pellucidum
d) Cerebral aqueduct
Answer: b) Corpus callosum
Rationale: The corpus callosum is a large, C-shaped bundle of nerve fibers that
allows communication between the left and right cerebral hemispheres.
2. The primary motor cortex is located in which lobe of the brain?
a) Parietal lobe
b) Temporal lobe
c) Occipital lobe
d) Frontal lobe
,Answer: d) Frontal lobe
Rationale: The precentral gyrus of the frontal lobe houses the primary motor
cortex, which is responsible for voluntary movement.
3. Which lobe processes auditory information and houses the primary auditory
cortex?
a) Frontal lobe
b) Parietal lobe
c) Temporal lobe
d) Insula
Answer: c) Temporal lobe
Rationale: The temporal lobe is involved in hearing, language comprehension, and
memory retrieval.
4. Which part of the brainstem regulates heart rate and breathing?
a) Pons
b) Midbrain
c) Medulla oblongata
,d) Cerebellum
Answer: c) Medulla oblongata
Rationale: The medulla oblongata contains vital centers that control autonomic
functions such as heart rate, blood pressure, and respiration.
5. What is the primary function of the cerebellum?
a) Visual processing
b) Coordination of movement and balance
c) Relaying sensory information
d) Regulating hunger
Answer: b) Coordination of movement and balance
Rationale: The cerebellum compares intended movements with actual
movements and makes adjustments for coordination, fine-tuning motor activity,
and maintaining balance.
6. Which type of fiber carries sensory information toward the central nervous
system?
a) Efferent fibers
, b) Motor fibers
c) Afferent fibers
d) Descending fibers
Answer: c) Afferent fibers
Rationale: Afferent (sensory) neurons carry impulses from sensory receptors to
the CNS. Efferent neurons carry commands away from the CNS to effectors.
7. Which ion is primarily responsible for the depolarization phase of an action
potential?
a) Potassium (K⁺)
b) Calcium (Ca²⁺)
c) Chloride (Cl⁻)
d) Sodium (Na⁺)
Answer: d) Sodium (Na⁺)
Rationale: When voltage-gated sodium channels open, Na⁺ rushes into the cell
down its electrochemical gradient, making the inside less negative
(depolarization).
