Question 1

Action potentials are generated by the opening of ________ gated channels and they occur on the ________.

Accepted Answer

A)  voltage-,axon
B)  voltage-,dendrite
C)  chemically,axon
D)  chemically,dendriteE) A) and B)
F) A) and C)

Question 2

Which statement is true regarding the action of an oligodendrocyte

Accepted Answer

A)  Each oligodendrocyte can form a myelin sheath around many axons simultaneously.
B)  An oligodendrocyte is responsible for forming part of the blood-brain barrier.
C)  Oligodendrocytes function only within the PNS.
D)  Each oligodendrocyte can wrap only a 1-mm portion of a single axon.
E)  A neurolemmocyte attacks pathogens.F) B) and E)
G) B) and D)

Question 3

Based on structure,the most common type of neuron is the _______ neuron.

Accepted Answer

A)  multipolar
B)  bipolar
C)  unipolar
D)  pseudounipolarE) A) and C)
F) A) and B)

Question 4

In order to trigger the release of neurotransmitter from a neuron terminal,calcium ions

Accepted Answer

A)  exit the synaptic knob through diffusion.
B)  bind to proteins on the surface of synaptic vesicles.
C)  penetrate the synaptic vesicles and bind to molecules of neurotransmitter.
D)  bind to ion channels on the neuron membrane and cause them to open for the transmitter.E) A) and C)
F) A) and D)

Question 5

The connective tissue wrapping that surrounds bundles (fascicles) of axons is the

Accepted Answer

A)  epineurium.
B)  endoneurium.
C)  perineurium.
D)  endosteum.
E)  periosteum.F) None of the above
G) B) and C)

Question 6

The portion of the nervous system that has voluntary control over skeletal muscles is the _____________ division.

Accepted Answer

A)  autonomic motor
B)  somatic sensory
C)  somatic motor
D)  visceral sensoryE) None of the above
F) A) and B)

Question 7

Most commonly,a synapse is made between a

Accepted Answer

A)  presynaptic neuron's dendrite and a postsynaptic membrane's cell body.
B)  presynaptic neuron's axon and a postsynaptic neuron's dendrite.
C)  presynaptic neuron's axon hillock and a postsynaptic neuron's cell body.
D)  presynaptic neuron's soma and a postsynaptic neuron's synaptic knob.E) None of the above
F) A) and B)

Question 8

The glial cell that defends the body against pathogens is the

Accepted Answer

A)  astrocyte.
B)  ependymal cell.
C)  neurolemmocyte.
D)  microglial cell.
E)  oligodendrocyte.F) All of the above
G) A) and B)

Question 9

Potassium has a higher concentration

Accepted Answer

A)  inside the cell versus outside the cell,and sodium is also more concentrated inside versus outside the cell.
B)  inside the cell versus outside the cell,whereas sodium has a higher concentration outside versus inside the cell.
C)  outside the cell versus inside the cell,and sodium is also more concentrated outside versus inside the cell.
D)  outside the cell versus inside the cell,whereas sodium has a higher concentration inside versus outside the cell.E) B) and D)
F) A) and B)

Question 10

What is the most abundant glial cell in the CNS

Accepted Answer

A)  Astrocyte
B)  Ependymal cell
C)  Neurolemmocyte
D)  Microglial cell
E)  OligodendrocyteF) A) and E)
G) B) and C)

Question 11

Where are synaptic knobs located

Accepted Answer

A)  At the tips of telodendria
B)  At the ends of dendrites
C)  Within the cell body
D)  Along axon collaterals
E)  At the axon hillockF) C) and D)
G) All of the above

Question 12

Endocannabinoids are neuromodulators that decrease neurotransmitter release from presynaptic neurons.

Accepted Answer

A) True 
 B)False

Question 13

Conductive activity in a neuron generally causes it to secrete

Accepted Answer

A)  a specific neurotransmitter that either excites or inhibits its target.
B)  a specific neurotransmitter that always excites its target.
C)  several types of neurotransmitters simultaneously,all of which excite the cell's target.
D)  several types of neurotransmitters simultaneously,that are broadcast to excite and inhibit multiple targets.
E)  several types of neurotransmitters simultaneously,that all work to prevent another immediate impulse.F) A) and D)
G) A) and B)

Question 14

The conductive segment of a neuron is its _______,a region that contains many _______ gated channels.

Accepted Answer

A)  axon,voltage-
B)  axon,chemically
C)  dendrite,voltage-
D)  dendrite,chemicallyE) B) and C)
F) C) and D)

Question 15

When multiple presynaptic neurons release neurotransmitter at various locations onto the postsynaptic neuron at the same time,this results in

Accepted Answer

A)  suprathreshold hyperpolarization.
B)  temporal summation.
C)  spatial summation.
D)  several action potentials.E) All of the above
F) B) and D)

Question 16

What structures extend into the axon and dendrite of a neuron to provide tensile strength

Accepted Answer

A)  Motor filaments
B)  Nissl bodies
C)  Telodendria
D)  Neurofibrils
E)  Collateral fibersF) C) and E)
G) C) and D)

Question 17

Graded potenials generally occur only on the axon of a neuron.

Accepted Answer

A) True 
 B)False

Question 18

Typically,the resting membrane potential of a neuron is

Accepted Answer

A)  7 V.
B)  700 mV.
C)  -7 V.
D)  -70 mV.
E)  0 mV.F) B) and C)
G) A) and B)

Exam 12: Nervous System: Nervous Tissue

Action potentials are generated by the opening of gated channels and they occur on the .

Correct Answer
verified

Which statement is true regarding the action of an oligodendrocyte

Correct Answer
verified

Typically,the resting membrane potential of a neuron is

Correct Answer
verified

Conductive activity in a neuron generally causes it to secrete

Correct Answer
verified

What structures extend into the axon and dendrite of a neuron to provide tensile strength

Correct Answer
verified

The portion of the nervous system that has voluntary control over skeletal muscles is the _____________ division.

Correct Answer
verified

Graded potenials generally occur only on the axon of a neuron.

Correct Answer
verified

What is the most abundant glial cell in the CNS

Correct Answer
verified

The connective tissue wrapping that surrounds bundles (fascicles) of axons is the

Correct Answer
verified

The conductive segment of a neuron is its _,a region that contains many _ gated channels.

Correct Answer
verified

Endocannabinoids are neuromodulators that decrease neurotransmitter release from presynaptic neurons.

Correct Answer
verified

Most commonly,a synapse is made between a

Correct Answer
verified

Based on structure,the most common type of neuron is the _______ neuron.

Correct Answer
verified

In order to trigger the release of neurotransmitter from a neuron terminal,calcium ions

Correct Answer
verified

Where are synaptic knobs located

Correct Answer
verified

The glial cell that defends the body against pathogens is the

Correct Answer
verified

When multiple presynaptic neurons release neurotransmitter at various locations onto the postsynaptic neuron at the same time,this results in

Correct Answer
verified

Potassium has a higher concentration

Correct Answer
verified

Exam 12: Nervous System: Nervous Tissue

Action potentials are generated by the opening of ________ gated channels and they occur on the ________.

Correct AnswerverifiedShow Answer

Which statement is true regarding the action of an oligodendrocyte

Correct AnswerverifiedShow Answer

Typically,the resting membrane potential of a neuron is

Correct AnswerverifiedShow Answer

Conductive activity in a neuron generally causes it to secrete

Correct AnswerverifiedShow Answer

What structures extend into the axon and dendrite of a neuron to provide tensile strength

Correct AnswerverifiedShow Answer

The portion of the nervous system that has voluntary control over skeletal muscles is the _____________ division.

Correct AnswerverifiedShow Answer

Graded potenials generally occur only on the axon of a neuron.

Correct AnswerverifiedShow Answer

What is the most abundant glial cell in the CNS

Correct AnswerverifiedShow Answer

The connective tissue wrapping that surrounds bundles (fascicles) of axons is the

Correct AnswerverifiedShow Answer

The conductive segment of a neuron is its _______,a region that contains many _______ gated channels.

Correct AnswerverifiedShow Answer

Endocannabinoids are neuromodulators that decrease neurotransmitter release from presynaptic neurons.

Correct AnswerverifiedShow Answer

Most commonly,a synapse is made between a

Correct AnswerverifiedShow Answer

Based on structure,the most common type of neuron is the _______ neuron.

Correct AnswerverifiedShow Answer

In order to trigger the release of neurotransmitter from a neuron terminal,calcium ions

Correct AnswerverifiedShow Answer

Where are synaptic knobs located

Correct AnswerverifiedShow Answer

The glial cell that defends the body against pathogens is the

Correct AnswerverifiedShow Answer

When multiple presynaptic neurons release neurotransmitter at various locations onto the postsynaptic neuron at the same time,this results in

Correct AnswerverifiedShow Answer

Potassium has a higher concentration

Correct AnswerverifiedShow Answer

Action potentials are generated by the opening of gated channels and they occur on the .

Correct Answer
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The conductive segment of a neuron is its _,a region that contains many _ gated channels.

Correct Answer
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