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A&P 1 101 MODULE 4 100% PASS ASSURED
EXAMINATION SOLUTIONS
The substance released at the axon terminal to
propagate a nervous impulse is called a -
correct answer- Neurotransmitters
(T/F) In myelinted axon the voltage-reulated
sodium channels are concentrated at the nods
of Ranvier - correct answer- True
What occurs when the inferior of the cell
becomes Less negative due to an influx of
sodium ions? - correct answer- Depolarization
After an action potential is started,
potassium ions diffuse out of the neuron due
to a change in membrane permeability and will
cause - correct answer- Repolarization
An ____ is also called a nerve impulse
transmitted by axons - correct answer- action
potential
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Schwann cells have the same function in the
PNS as the ___ have in the CNS - correct
answer- Oligodendrocytes
Stimulation by multiple action potentials from
a single neuron - correct answer- temporal
summation
Stimulation of the postsynapthic neuron by
many terminals at the same time - correct
answer- spatial summation
A nerve must reach ___ in order to start an
action potential - correct answer- Threshold
stimulus
What ion is responsible for causing the
vesicle containing the neurotransmitter to
fuse with the axon terminal and release the
neurotransmitter? - correct answer- Calcium
, 3 | Page
What are ciliated CNS neuroglia that play an
active role in moving the cerebrospinal fluid
called? - correct answer- epedymal cells
Which of the following is an excitatory
neurotransmitter secreted by motor neurons
innervating skeletal muscle? - correct answer-
acetylcholine
Saltatory conduction is made possible by
________. - correct answer- the myelin sheath
When neurotransmitters are released they must
cross the ___ to reach its receptor. - correct
answer- synaptic arch/clef
(T/F) Myelination of the nerve fibers in the
central nervous system is the job of the
oligodendrocytes. - correct answer- true
The part of the neuron that conducts impulses
away from its cells body is called a/an ___? -
correct answer- axon
A&P 1 101 MODULE 4 100% PASS ASSURED
EXAMINATION SOLUTIONS
The substance released at the axon terminal to
propagate a nervous impulse is called a -
correct answer- Neurotransmitters
(T/F) In myelinted axon the voltage-reulated
sodium channels are concentrated at the nods
of Ranvier - correct answer- True
What occurs when the inferior of the cell
becomes Less negative due to an influx of
sodium ions? - correct answer- Depolarization
After an action potential is started,
potassium ions diffuse out of the neuron due
to a change in membrane permeability and will
cause - correct answer- Repolarization
An ____ is also called a nerve impulse
transmitted by axons - correct answer- action
potential
,2 | Page
Schwann cells have the same function in the
PNS as the ___ have in the CNS - correct
answer- Oligodendrocytes
Stimulation by multiple action potentials from
a single neuron - correct answer- temporal
summation
Stimulation of the postsynapthic neuron by
many terminals at the same time - correct
answer- spatial summation
A nerve must reach ___ in order to start an
action potential - correct answer- Threshold
stimulus
What ion is responsible for causing the
vesicle containing the neurotransmitter to
fuse with the axon terminal and release the
neurotransmitter? - correct answer- Calcium
, 3 | Page
What are ciliated CNS neuroglia that play an
active role in moving the cerebrospinal fluid
called? - correct answer- epedymal cells
Which of the following is an excitatory
neurotransmitter secreted by motor neurons
innervating skeletal muscle? - correct answer-
acetylcholine
Saltatory conduction is made possible by
________. - correct answer- the myelin sheath
When neurotransmitters are released they must
cross the ___ to reach its receptor. - correct
answer- synaptic arch/clef
(T/F) Myelination of the nerve fibers in the
central nervous system is the job of the
oligodendrocytes. - correct answer- true
The part of the neuron that conducts impulses
away from its cells body is called a/an ___? -
correct answer- axon
