Anatomy & Physiology for Speech, Language,
and Hearing
7th Edition
• Author(s)J. Anthony Seikel, David G.
Drumright, Daniel J. Hudock
TEST BANK
Chapter 11. Neuroanatomy
Overview
Sense, Sensor, and Stimulation
Divisions of the Nervous System
Central Nervous System and Peripheral Nervous System
Autonomic and Somatic Nervous Systems
Development Divisions
Anatomy of the Central Nervous System and Peripheral Nervous System
Neurons……..
,
,Question 1
In the central nervous system, which glial cell is responsible for
producing the myelin sheath around axons?
A. Microglial cell
B. Astrocyte
C. Oligodendrocyte
D. Schwann cell
Correct Answer: C
Rationale: Oligodendrocytes are the glial cells in the CNS that
form the myelin sheath around axons. This myelination
increases signal conduction speed in CNS pathways. Astrocytes
(B) provide structural and metabolic support but do not
myelinate axons, and microglia (A) are immune cells in the CNS.
Schwann cells (D) myelinate axons in the peripheral nervous
system, not the CNS. Thus, C is correct and the others are
incorrect.
Question 2
Which type of white-matter fiber bundle connects cortical
regions in one hemisphere to the corresponding regions in the
opposite hemisphere?
A. Association fibers
B. Projection fibers
, C. Commissural fibers
D. Peripheral nerves
Correct Answer: C
Rationale: Commissural fibers connect the two cerebral
hemispheres; the largest example is the corpus callosum.
Association fibers (A) connect regions within the same
hemisphere, not across hemispheres. Projection fibers (B)
connect cortical areas with subcortical structures (e.g.
brainstem or spinal cord). Peripheral nerves (D) are part of the
peripheral nervous system, not intracerebral fiber tracts.
Therefore, commissural fibers (C) correctly describe
interhemispheric connections, and the other choices are
incorrect.
Question 3
Which of the following structures is located in the midbrain?
A. Superior colliculus
B. Pons
C. Medullary pyramid
D. Caudate nucleus
Correct Answer: A
Rationale: The superior colliculus is a structure on the dorsal
midbrain involved in visual reflexes. It lies above the inferior
colliculus on the midbrain’s tectum. The pons (B) is in the
and Hearing
7th Edition
• Author(s)J. Anthony Seikel, David G.
Drumright, Daniel J. Hudock
TEST BANK
Chapter 11. Neuroanatomy
Overview
Sense, Sensor, and Stimulation
Divisions of the Nervous System
Central Nervous System and Peripheral Nervous System
Autonomic and Somatic Nervous Systems
Development Divisions
Anatomy of the Central Nervous System and Peripheral Nervous System
Neurons……..
,
,Question 1
In the central nervous system, which glial cell is responsible for
producing the myelin sheath around axons?
A. Microglial cell
B. Astrocyte
C. Oligodendrocyte
D. Schwann cell
Correct Answer: C
Rationale: Oligodendrocytes are the glial cells in the CNS that
form the myelin sheath around axons. This myelination
increases signal conduction speed in CNS pathways. Astrocytes
(B) provide structural and metabolic support but do not
myelinate axons, and microglia (A) are immune cells in the CNS.
Schwann cells (D) myelinate axons in the peripheral nervous
system, not the CNS. Thus, C is correct and the others are
incorrect.
Question 2
Which type of white-matter fiber bundle connects cortical
regions in one hemisphere to the corresponding regions in the
opposite hemisphere?
A. Association fibers
B. Projection fibers
, C. Commissural fibers
D. Peripheral nerves
Correct Answer: C
Rationale: Commissural fibers connect the two cerebral
hemispheres; the largest example is the corpus callosum.
Association fibers (A) connect regions within the same
hemisphere, not across hemispheres. Projection fibers (B)
connect cortical areas with subcortical structures (e.g.
brainstem or spinal cord). Peripheral nerves (D) are part of the
peripheral nervous system, not intracerebral fiber tracts.
Therefore, commissural fibers (C) correctly describe
interhemispheric connections, and the other choices are
incorrect.
Question 3
Which of the following structures is located in the midbrain?
A. Superior colliculus
B. Pons
C. Medullary pyramid
D. Caudate nucleus
Correct Answer: A
Rationale: The superior colliculus is a structure on the dorsal
midbrain involved in visual reflexes. It lies above the inferior
colliculus on the midbrain’s tectum. The pons (B) is in the
