BIO 201 - Exam 4 - Dr. Larson, ASU
Practice Questions with Correct
Answers and Rationales
This comprehensive practice exam is designed to help students
prepare for the BIO 201 Exam 4 at Arizona State University (ASU) with
Dr. Larson. It covers the central nervous system, brain anatomy, cranial
nerves, and muscle physiology.
SECTION 1: NEUROANATOMY & BRAIN
STRUCTURE (Questions 1-25)
Question 1
Define rostral.
A. Toward the tail
B. Toward the nose
C. Toward the back
D. Toward the front
Correct Answer: B. Toward the nose
Rationale: In neuroanatomy, "rostral" refers to a direction toward the
nose or forehead. In humans, this corresponds to an anterior direction.
This terminology is consistent across vertebrate anatomy.
,Question 2
Define caudal.
A. Toward the nose
B. Toward the forehead
C. Towards the tail
D. Toward the front
Correct Answer: C. Towards the tail
Rationale: "Caudal" refers to a direction toward the tail or spinal cord.
In humans, this corresponds to an inferior direction. This directional
terminology is standard in neuroanatomical descriptions.
Question 3
What is the cortex?
A. Deeper masses of grey matter
B. Bundles of myelinated axons
C. Surface layer of grey matter
D. Folds of the brain
Correct Answer: C. Surface layer of grey matter
Rationale: The cortex is the outer layer of grey matter covering
structures such as the cerebrum and cerebellum. It consists primarily
of neuron cell bodies and dendrites.
Question 4
What are nuclei in the context of neuroanatomy?
,A. Surface layer of grey matter
B. Bundles of myelinated axons
C. Deeper masses of grey matter
D. Shallow grooves of the brain
Correct Answer: C. Deeper masses of grey matter
Rationale: Nuclei are deeper masses of grey matter located within the
brain, distinct from the cortical grey matter on the surface.
Question 5
What are tracts?
A. Bundles of myelinated axons (white matter)
B. Surface layer of grey matter
C. Deeper masses of grey matter
D. Folds of the brain
Correct Answer: A. Bundles of myelinated axons (white matter)
Rationale: Tracts are bundles of myelinated axons that form the white
matter of the brain and spinal cord. They connect different parts of the
nervous system.
Question 6
Compare the volume of the cerebrum and cerebellum.
A. The cerebellum is about 83% of total brain volume
B. The cerebrum is about 83% of total brain volume, but the
cerebellum contains over half of all neurons
, C. Both are equal in volume
D. The cerebellum contains 90% of all neurons
Correct Answer: B. The cerebrum is about 83% of total brain volume,
but the cerebellum contains over half of all neurons
Rationale: The cerebrum makes up approximately 83% of the total
brain volume. However, the cerebellum contains more than half of all
the brain's neurons, despite being smaller in volume.
Question 7
List the components of the brainstem.
A. Cerebrum and cerebellum
B. Thalamus and hypothalamus
C. Diencephalon, midbrain, pons, and medulla oblongata
D. Frontal lobe and temporal lobe
Correct Answer: C. Diencephalon, midbrain, pons, and medulla
oblongata
Rationale: The brainstem consists of the diencephalon, midbrain,
pons, and medulla oblongata. The medulla oblongata begins at the
foramen magnum of the skull.
Question 8
What structure separates the two cerebral hemispheres?
A. Central sulcus
B. Longitudinal fissure
Practice Questions with Correct
Answers and Rationales
This comprehensive practice exam is designed to help students
prepare for the BIO 201 Exam 4 at Arizona State University (ASU) with
Dr. Larson. It covers the central nervous system, brain anatomy, cranial
nerves, and muscle physiology.
SECTION 1: NEUROANATOMY & BRAIN
STRUCTURE (Questions 1-25)
Question 1
Define rostral.
A. Toward the tail
B. Toward the nose
C. Toward the back
D. Toward the front
Correct Answer: B. Toward the nose
Rationale: In neuroanatomy, "rostral" refers to a direction toward the
nose or forehead. In humans, this corresponds to an anterior direction.
This terminology is consistent across vertebrate anatomy.
,Question 2
Define caudal.
A. Toward the nose
B. Toward the forehead
C. Towards the tail
D. Toward the front
Correct Answer: C. Towards the tail
Rationale: "Caudal" refers to a direction toward the tail or spinal cord.
In humans, this corresponds to an inferior direction. This directional
terminology is standard in neuroanatomical descriptions.
Question 3
What is the cortex?
A. Deeper masses of grey matter
B. Bundles of myelinated axons
C. Surface layer of grey matter
D. Folds of the brain
Correct Answer: C. Surface layer of grey matter
Rationale: The cortex is the outer layer of grey matter covering
structures such as the cerebrum and cerebellum. It consists primarily
of neuron cell bodies and dendrites.
Question 4
What are nuclei in the context of neuroanatomy?
,A. Surface layer of grey matter
B. Bundles of myelinated axons
C. Deeper masses of grey matter
D. Shallow grooves of the brain
Correct Answer: C. Deeper masses of grey matter
Rationale: Nuclei are deeper masses of grey matter located within the
brain, distinct from the cortical grey matter on the surface.
Question 5
What are tracts?
A. Bundles of myelinated axons (white matter)
B. Surface layer of grey matter
C. Deeper masses of grey matter
D. Folds of the brain
Correct Answer: A. Bundles of myelinated axons (white matter)
Rationale: Tracts are bundles of myelinated axons that form the white
matter of the brain and spinal cord. They connect different parts of the
nervous system.
Question 6
Compare the volume of the cerebrum and cerebellum.
A. The cerebellum is about 83% of total brain volume
B. The cerebrum is about 83% of total brain volume, but the
cerebellum contains over half of all neurons
, C. Both are equal in volume
D. The cerebellum contains 90% of all neurons
Correct Answer: B. The cerebrum is about 83% of total brain volume,
but the cerebellum contains over half of all neurons
Rationale: The cerebrum makes up approximately 83% of the total
brain volume. However, the cerebellum contains more than half of all
the brain's neurons, despite being smaller in volume.
Question 7
List the components of the brainstem.
A. Cerebrum and cerebellum
B. Thalamus and hypothalamus
C. Diencephalon, midbrain, pons, and medulla oblongata
D. Frontal lobe and temporal lobe
Correct Answer: C. Diencephalon, midbrain, pons, and medulla
oblongata
Rationale: The brainstem consists of the diencephalon, midbrain,
pons, and medulla oblongata. The medulla oblongata begins at the
foramen magnum of the skull.
Question 8
What structure separates the two cerebral hemispheres?
A. Central sulcus
B. Longitudinal fissure
