Question 1

A neuron is receiving a stimulus which gets stronger and stronger.The result is

Accepted Answer

A)  amplitude of the action potential increases.
B)  duration of the action potential increases.
C)  frequency of occurrence of action potentials increases.
D)  resonance of action potentials increases.
E)  height of the action potentials increases.F) A) and B)
G) C) and D)

Question 2

-The figure is a process figure of the chemical synapse.What does "D" represent?

Accepted Answer

A)  postsynaptic membrane
B)  synaptic cleft
C)  synaptic vesicle
D)  voltage-gated calcium channel
E)  presynaptic terminalF) None of the above
G) D) and E)

Question 3

Action potentials are conducted more rapidly when transmission is

Accepted Answer

A)  from node to node on a myelinated axon.
B)  on a small diameter axon.
C)  on an unmyelinated axon.
D)  from internode to internode.
E)  from internode to node on a myelinated axon.F) B) and C)
G) All of the above

Question 4

Which of the following is mismatched?

Accepted Answer

A)  microglia - provide support for the neuron cell body
B)  astrocytes - blood-brain barrier
C)  oligodendrocytes - form myelin sheaths
D)  ependymal cells - produce cerebrospinal fluid
E)  ependymal cells - choroid plexusF) C) and E)
G) A) and C)

Question 5

Axons

Accepted Answer

A)  contain the nucleus.
B)  are numerous extensions from each neuron.
C)  do not have a trigger zone.
D)  have a distal portion that branches to form the presynaptic terminals.
E)  do not have a resting membrane potential.F) A) and B)
G) A) and C)

Question 6

Match the neuroglial cell with its function.
-Schwann cell

Accepted Answer

A)  influence function of blood-brain barrier
B)  macrophages in CNS
C)  produce cerebrospinal fluid
D)  form myelin sheath around axons in CNS
E)  form myelin sheath around part of the axon in the PNSF) A) and B)
G) B) and E)

Question 7

Match the neuroglial cell with its function.
-microglia

Accepted Answer

A)  influence function of blood-brain barrier
B)  macrophages in CNS
C)  produce cerebrospinal fluid
D)  form myelin sheath around axons in CNS
E)  form myelin sheath around part of the axon in the PNSF) B) and D)
G) B) and C)

Question 8

Action potentials are conducted rapidly from one node of Ranvier to the next in a process called ____________ conduction.

Accepted Answer

The answer of Action potentials are conducted rapidly from one...

Question 9

For the resting membrane potential,increasing the sodium ion concentration in the ECF results in

Accepted Answer

A)  hyperpolarization.
B)  depolarization.
C)  hypopolarization.
D)  little change in membrane potential.
E)  There is not enough information to determine the results.F) C) and E)
G) B) and D)

Question 10

Which of the following is NOT a neuroglia of the CNS?

Accepted Answer

A)  ependymal cells
B)  satellite cells
C)  oligodendrocytes
D)  astrocytesE) None of the above
F) A) and D)

Question 11

Which of the following is mismatched?

Accepted Answer

A)  central nervous system - brain
B)  autonomic nervous system - sympathetic and parasympathetic divisions
C)  peripheral nervous system - spinal nerves
D)  somatic nervous system - sensory division of PNS
E)  peripheral nervous system - sensory and motor divisionsF) A) and C)
G) A) and D)

Question 12

Gap junctions are functional __________ synapses.

Accepted Answer

A)  chemical
B)  electrical
C)  potential
D)  intracellular
E)  neuromuscularF) C) and D)
G) A) and B) B

Question 13

Continuous conduction of an action potential means that

Accepted Answer

A)  once one action potential is created,it moves down the axon.
B)  the whole axon depolarizes at the same time.
C)  one action potential stimulates the production of a new action potential at the adjacent site.
D)  an action potential is conducted from one node of Ranvier to the next node.E) A) and B)
F) A) and C)

Question 14

____________ are processes that conduct electric signals toward the cell body.

Accepted Answer

dendrites

Question 15

The central nervous system includes the

Accepted Answer

A)  ganglia.
B)  spinal cord.
C)  spinal nerves.
D)  cranial nerves.
E)  sensory receptors.F) A) and E)
G) A) and D)

Question 16

Match the following concerning concentration differences across the plasma membrane.
-postassium ions

Accepted Answer

A)  concentration of potassium
B)  concentration of sodium and chloride
C)  negatively charged proteins
D)  sodium/potassium pump
E)  plasma membrane is more permeable to this ion because of leak ion channelsF) A) and D)
G) B) and D)

Question 17

During depolarization of the plasma membrane,

Accepted Answer

A)  sodium ions move rapidly into the cell.
B)  potassium ions move rapidly out of the cell.
C)  membrane permeability to sodium ions decreases.
D)  the outside of the cell becomes positively charged relative to the inside.
E)  sodium ions move rapidly out of the cell.F) All of the above
G) C) and E)

Question 18

Monamine oxidase inhibitors (MAO inhibitors)

Accepted Answer

A)  prevent synaptic transmission.
B)  enhance the breakdown of norepinephrine.
C)  enhance the binding of norepinephrine to its receptors.
D)  prevent the release of norepinephrine by the presynaptic terminal.
E)  have no effect on the action of norepinephrine.F) A) and C)
G) D) and E) C

Question 19

-The figure illustrates the Action Potential.What does "C" represent?

Accepted Answer

A)  repolarization
B)  depolarization
C)  local potential
D)  threshold
E)  afterpotentialF) A) and E)
G) A) and C)

Question 20

The peripheral nervous system includes the

Accepted Answer

A)  brain.
B)  spinal cord.
C)  cranial nerves.
D)  blood-brain barrier.
E)  cerebellum.F) None of the above
G) C) and E)

Exam 11: Functional Organization of Nervous Tissue

A neuron is receiving a stimulus which gets stronger and stronger.The result is

Correct AnswerverifiedShow Answer

-The figure is a process figure of the chemical synapse.What does "D" represent?

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Action potentials are conducted more rapidly when transmission is

Correct AnswerverifiedShow Answer

Which of the following is mismatched?

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Axons

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Match the neuroglial cell with its function. -Schwann cell

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Match the neuroglial cell with its function. -microglia

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Action potentials are conducted rapidly from one node of Ranvier to the next in a process called ____________ conduction.

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For the resting membrane potential,increasing the sodium ion concentration in the ECF results in

Correct AnswerverifiedShow Answer

Which of the following is NOT a neuroglia of the CNS?

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Which of the following is mismatched?

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Gap junctions are functional __________ synapses.

Correct AnswerverifiedB

Continuous conduction of an action potential means that

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____________ are processes that conduct electric signals toward the cell body.

Correct Answerverifieddendrites

The central nervous system includes the

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Match the following concerning concentration differences across the plasma membrane. -postassium ions

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During depolarization of the plasma membrane,

Correct AnswerverifiedShow Answer

Monamine oxidase inhibitors (MAO inhibitors)

Correct AnswerverifiedC

-The figure illustrates the Action Potential.What does "C" represent?

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The peripheral nervous system includes the

Correct AnswerverifiedShow Answer

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B

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dendrites

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C

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