BBS 200 Week 2 Quiz Questions and
Correct Answers | 2026 Update | 100%
Correct - Sonoran Desert School
Section 1: Brain Histology & Cellular Components (Questions 1–8)
Q1: Which cytoskeletal filament serves as the primary guide for axonal transport, enabling the
movement of materials from the cell body to distal axon terminals?
A. Neurofilaments
B. Microfilaments
C. Microtubules [CORRECT]
D. Intermediate filaments
Correct Answer: C
Rationale: Correct because microtubules are the cytoskeletal filaments that serve as tracks for
axonal transport, with kinesin and dynein motor proteins moving cargo along them. Per BBS
200 curriculum standards, microtubules are essential for both anterograde and retrograde
transport in neurons.
Q2: A neuroscience student examines a stained tissue section and observes that the stain
labels primarily cell bodies and clusters of rough endoplasmic reticulum. Which staining
method was most likely used?
A. Golgi stain
B. Nissl stain [CORRECT]
C. Immunohistochemical stain for neurofilaments
D. Silver stain for axons
Correct Answer: B
Rationale: Correct because the Nissl stain specifically labels Nissl substance—composed of
rough endoplasmic reticulum and ribosomes—which is concentrated in the soma and
dendrites of neurons. Standard neurophysiology principles state that Nissl staining labels cell
bodies, whereas Golgi staining labels entire neurons including dendrites and axons.
, Q3: During a laboratory examination of CNS tissue, a student identifies a glial cell type that
forms myelin sheaths around multiple axons in the central nervous system. Which cell type
was identified?
A. Schwann cell
B. Astrocyte
C. Oligodendrocyte [CORRECT]
D. Microglia
Correct Answer: C
Rationale: Correct because oligodendrocytes are the myelinating glial cells of the central
nervous system, with each oligodendrocyte capable of myelinating multiple axons. Per BBS
200 curriculum standards, Schwann cells perform an analogous function in the peripheral
nervous system but myelinate only one axon segment each.
Q4: A researcher is studying the movement of neurotrophic factors from the axon terminal
back to the cell body following retrograde transport. Which motor protein is directly
responsible for this retrograde movement along microtubules?
A. Kinesin
B. Myosin
C. Dynein [CORRECT]
D. Actin
Correct Answer: C
Rationale: Correct because dynein is the motor protein that drives retrograde transport,
moving materials from the axon terminal back toward the cell body along microtubules.
Standard neurophysiology principles state that kinesin mediates anterograde transport (cell
body to terminal), while dynein mediates retrograde transport.
Q5: Which of the following best describes the structural classification of a neuron that
possesses one axon and multiple dendrites, representing the most common neuronal type in
the central nervous system?
A. Unipolar neuron
B. Bipolar neuron
C. Multipolar neuron [CORRECT]
Correct Answers | 2026 Update | 100%
Correct - Sonoran Desert School
Section 1: Brain Histology & Cellular Components (Questions 1–8)
Q1: Which cytoskeletal filament serves as the primary guide for axonal transport, enabling the
movement of materials from the cell body to distal axon terminals?
A. Neurofilaments
B. Microfilaments
C. Microtubules [CORRECT]
D. Intermediate filaments
Correct Answer: C
Rationale: Correct because microtubules are the cytoskeletal filaments that serve as tracks for
axonal transport, with kinesin and dynein motor proteins moving cargo along them. Per BBS
200 curriculum standards, microtubules are essential for both anterograde and retrograde
transport in neurons.
Q2: A neuroscience student examines a stained tissue section and observes that the stain
labels primarily cell bodies and clusters of rough endoplasmic reticulum. Which staining
method was most likely used?
A. Golgi stain
B. Nissl stain [CORRECT]
C. Immunohistochemical stain for neurofilaments
D. Silver stain for axons
Correct Answer: B
Rationale: Correct because the Nissl stain specifically labels Nissl substance—composed of
rough endoplasmic reticulum and ribosomes—which is concentrated in the soma and
dendrites of neurons. Standard neurophysiology principles state that Nissl staining labels cell
bodies, whereas Golgi staining labels entire neurons including dendrites and axons.
, Q3: During a laboratory examination of CNS tissue, a student identifies a glial cell type that
forms myelin sheaths around multiple axons in the central nervous system. Which cell type
was identified?
A. Schwann cell
B. Astrocyte
C. Oligodendrocyte [CORRECT]
D. Microglia
Correct Answer: C
Rationale: Correct because oligodendrocytes are the myelinating glial cells of the central
nervous system, with each oligodendrocyte capable of myelinating multiple axons. Per BBS
200 curriculum standards, Schwann cells perform an analogous function in the peripheral
nervous system but myelinate only one axon segment each.
Q4: A researcher is studying the movement of neurotrophic factors from the axon terminal
back to the cell body following retrograde transport. Which motor protein is directly
responsible for this retrograde movement along microtubules?
A. Kinesin
B. Myosin
C. Dynein [CORRECT]
D. Actin
Correct Answer: C
Rationale: Correct because dynein is the motor protein that drives retrograde transport,
moving materials from the axon terminal back toward the cell body along microtubules.
Standard neurophysiology principles state that kinesin mediates anterograde transport (cell
body to terminal), while dynein mediates retrograde transport.
Q5: Which of the following best describes the structural classification of a neuron that
possesses one axon and multiple dendrites, representing the most common neuronal type in
the central nervous system?
A. Unipolar neuron
B. Bipolar neuron
C. Multipolar neuron [CORRECT]
