COMPLETE TEST
BANK :
PORTAGE LEARNING BIOL 322 NEUROSCIENCE ACTUAL
QUESTIONS WITH CORRECT ANSWERS (100% VERIFIED)
GRADED A+| ALL MODULES
Module 1: Anatomy of the Nervous System
1) Which part of the neuron is primarily responsible for receiving incoming signals
from other neurons?
A) Axon
B) Soma
C) Dendrite
D) Axon terminal
Answer: C
Page 1
,Dendrites are branch-like structures that extend from the cell body and function as the
primary input zone for receiving chemical or electrical signals.
2) Which glial cell type is responsible for forming the blood-brain barrier (BBB) in the
Central Nervous System?
A) Oligodendrocytes
B) Astrocytes
C) Microglia
D) Schwann cells
Answer: B
Astrocytes possess end-feet that wrap around blood vessels, regulating the passage of
substances between the blood and the brain tissue.
3) What is the typical resting membrane potential of a neuron?
A) +40 mV
B) 0 mV
C) -70 mV
D) -55 mV
Answer: C
At rest, the inside of a neuron is typically around -70 mV relative to the outside due to ion
distribution and permeability.
4) The movement of an action potential along a myelinated axon from one Node of
Ranvier to the next is called:
A) Continuous conduction
B) Retrograde transport
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,C) Saltatory conduction
D) Passive diffusion
Answer: C
Saltatory conduction refers to the "jumping" of the action potential between nodes, which
significantly increases signal speed.
5) Which ion is found in higher concentration inside the neuron compared to the
extracellular fluid at rest?
A) Sodium (Na+)
B) Chloride (Cl-)
C) Potassium (K+)
D) Calcium (Ca2+)
Answer: C
Potassium ions (K+) are concentrated inside the cell, while Na+, Cl-, and Ca2+ are more
concentrated outside.
6) Which glial cells provide the myelin sheath for axons in the Peripheral Nervous
System (PNS)?
A) Satellite cells
B) Oligodendrocytes
C) Ependymal cells
D) Schwann cells
Answer: D
Schwann cells myelinate a single axon segment in the PNS.
Page 3
, 7) Which type of glial cell is responsible for forming the myelin sheath in the Central
Nervous System (CNS)?
A) Schwann cells
B) Microglia
C) Oligodendrocytes
D) Astrocytes
Answer: C
Oligodendrocytes myelinate multiple axons in the CNS, whereas Schwann cells perform
this function in the Peripheral Nervous System.
8) Ependymal cells contribute to nervous system function by performing which
action?
A) Producing cerebrospinal fluid
B) Myelinating peripheral axons
C) Phagocytosing cellular debris
D) Transmitting action potentials
Answer: A
Ependymal cells are ciliated epithelial cells that line the ventricles and central canal, and
they are part of the choroid plexus that secretes cerebrospinal fluid.
9) The junction where a neuron communicates with another cell is called which of the
following?
A) A node of Ranvier
B) A synapse
C) An axon hillock
D) A myelin sheath
Page 4
BANK :
PORTAGE LEARNING BIOL 322 NEUROSCIENCE ACTUAL
QUESTIONS WITH CORRECT ANSWERS (100% VERIFIED)
GRADED A+| ALL MODULES
Module 1: Anatomy of the Nervous System
1) Which part of the neuron is primarily responsible for receiving incoming signals
from other neurons?
A) Axon
B) Soma
C) Dendrite
D) Axon terminal
Answer: C
Page 1
,Dendrites are branch-like structures that extend from the cell body and function as the
primary input zone for receiving chemical or electrical signals.
2) Which glial cell type is responsible for forming the blood-brain barrier (BBB) in the
Central Nervous System?
A) Oligodendrocytes
B) Astrocytes
C) Microglia
D) Schwann cells
Answer: B
Astrocytes possess end-feet that wrap around blood vessels, regulating the passage of
substances between the blood and the brain tissue.
3) What is the typical resting membrane potential of a neuron?
A) +40 mV
B) 0 mV
C) -70 mV
D) -55 mV
Answer: C
At rest, the inside of a neuron is typically around -70 mV relative to the outside due to ion
distribution and permeability.
4) The movement of an action potential along a myelinated axon from one Node of
Ranvier to the next is called:
A) Continuous conduction
B) Retrograde transport
Page 2
,C) Saltatory conduction
D) Passive diffusion
Answer: C
Saltatory conduction refers to the "jumping" of the action potential between nodes, which
significantly increases signal speed.
5) Which ion is found in higher concentration inside the neuron compared to the
extracellular fluid at rest?
A) Sodium (Na+)
B) Chloride (Cl-)
C) Potassium (K+)
D) Calcium (Ca2+)
Answer: C
Potassium ions (K+) are concentrated inside the cell, while Na+, Cl-, and Ca2+ are more
concentrated outside.
6) Which glial cells provide the myelin sheath for axons in the Peripheral Nervous
System (PNS)?
A) Satellite cells
B) Oligodendrocytes
C) Ependymal cells
D) Schwann cells
Answer: D
Schwann cells myelinate a single axon segment in the PNS.
Page 3
, 7) Which type of glial cell is responsible for forming the myelin sheath in the Central
Nervous System (CNS)?
A) Schwann cells
B) Microglia
C) Oligodendrocytes
D) Astrocytes
Answer: C
Oligodendrocytes myelinate multiple axons in the CNS, whereas Schwann cells perform
this function in the Peripheral Nervous System.
8) Ependymal cells contribute to nervous system function by performing which
action?
A) Producing cerebrospinal fluid
B) Myelinating peripheral axons
C) Phagocytosing cellular debris
D) Transmitting action potentials
Answer: A
Ependymal cells are ciliated epithelial cells that line the ventricles and central canal, and
they are part of the choroid plexus that secretes cerebrospinal fluid.
9) The junction where a neuron communicates with another cell is called which of the
following?
A) A node of Ranvier
B) A synapse
C) An axon hillock
D) A myelin sheath
Page 4
