Nervous System BIO-201 Wireman
GCU Study Guide Exam with Solved
Solutions 2025-2026 Updated.
Properties of Neurons - Answer 1. Excitability
2. Conductivity
3. Secretion
function of nervous system - Answer receives sensory information and coordinates the body's
response
Which are the two major types/groups of cells that make up nervous tissue? - Answer neurons
(send and receive signals) and neuroglia (support and protect neurons)
What are the four neuroglia of the CNS and the two neuroglia of the PNS? - Answer CNS:
astrocytes, microglia, ependymal cells, oligodendrocytes
PNS: satellite cells and schwann cells
Structure of a neuron - Answer
Compare and contrast the functions of axons and dendrites. - Answer axon: carries electrical
signals
dendrite: receive information from other neurons
axoplasm - Answer cytoplasm of axon
Axolemma - Answer cell membrane of axon
axon collaterals - Answer branches of an axon
Axon telodendria - Answer fine extensions of distal axon
, Along the axons of myelinated neurons there are gaps in the myelin where the axolemma is
exposed. What is the name given to these gaps in myelin? - Answer nodes of ranvier
Describe how a nerve is "bundled." - Answer endoneurium-surrounds each bundle
perineurium-surrounds each fascicle
epineurium-groups fascicles together
What is the name of the cell whose function is to connect neurons to blood capillaries? -
Answer astrocyte
What is the function of satellite cells found in the PNS? - Answer protect neuron cell bodies
Which cell of the CNS is responsible for circulating cerebrospinal fluid in the major cavities of
the brain and spinal cord? - Answer ependymal cells (have cilia)
What is the function of microglia? - Answer Dispose of debris in areas of infection, trauma or
stroke
Which cells form myelin in the PNS? Which cells form myelin in the CNS? - Answer CNS:
oligodendrocytes
PNS: schwann cells
Describe the relationship of sodium and potassium concentrations inside and outside of the cell
with the resting membrane potential. - Answer Na+ concentration on the outside of the cell
and K+ concentration
What happens during threshold? - Answer If reached voltage gated Na+ channels will open
What ion is responsible for depolarization? - Answer Na+
What ion is responsible for repolarization? - Answer K+
GCU Study Guide Exam with Solved
Solutions 2025-2026 Updated.
Properties of Neurons - Answer 1. Excitability
2. Conductivity
3. Secretion
function of nervous system - Answer receives sensory information and coordinates the body's
response
Which are the two major types/groups of cells that make up nervous tissue? - Answer neurons
(send and receive signals) and neuroglia (support and protect neurons)
What are the four neuroglia of the CNS and the two neuroglia of the PNS? - Answer CNS:
astrocytes, microglia, ependymal cells, oligodendrocytes
PNS: satellite cells and schwann cells
Structure of a neuron - Answer
Compare and contrast the functions of axons and dendrites. - Answer axon: carries electrical
signals
dendrite: receive information from other neurons
axoplasm - Answer cytoplasm of axon
Axolemma - Answer cell membrane of axon
axon collaterals - Answer branches of an axon
Axon telodendria - Answer fine extensions of distal axon
, Along the axons of myelinated neurons there are gaps in the myelin where the axolemma is
exposed. What is the name given to these gaps in myelin? - Answer nodes of ranvier
Describe how a nerve is "bundled." - Answer endoneurium-surrounds each bundle
perineurium-surrounds each fascicle
epineurium-groups fascicles together
What is the name of the cell whose function is to connect neurons to blood capillaries? -
Answer astrocyte
What is the function of satellite cells found in the PNS? - Answer protect neuron cell bodies
Which cell of the CNS is responsible for circulating cerebrospinal fluid in the major cavities of
the brain and spinal cord? - Answer ependymal cells (have cilia)
What is the function of microglia? - Answer Dispose of debris in areas of infection, trauma or
stroke
Which cells form myelin in the PNS? Which cells form myelin in the CNS? - Answer CNS:
oligodendrocytes
PNS: schwann cells
Describe the relationship of sodium and potassium concentrations inside and outside of the cell
with the resting membrane potential. - Answer Na+ concentration on the outside of the cell
and K+ concentration
What happens during threshold? - Answer If reached voltage gated Na+ channels will open
What ion is responsible for depolarization? - Answer Na+
What ion is responsible for repolarization? - Answer K+
