Question 1

Match the glial 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) A) and B)
G) A) and C)

Question 2

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 3

If you cut bundles of axons and their myelin sheaths in the PNS, you cut ________.

Accepted Answer

A)   ganglia
B)   nuclei
C)   nerves
D)   gray matter
E)   nerve tractsF) C) and D)
G) B) and C)

Question 4

Axons contain ________.

Accepted Answer

A)   the trigger zone
B)   foot processes
C)   Nissl bodies
D)   the soma
E)   the rough endoplasmic reticulumF) B) and D)
G) A) and C)

Question 5

The respiratory center of the brain (taking into account input from chemoreceptors, pulmonary stretch receptors, and higher centers of the brain to determine respiratory output)  is an example of a ________ circuit.

Accepted Answer

A)   converging
B)   diverging
C)   parallel after-discharge
D)   reverberatingE) A) and C)
F) All of the above

Question 6

Frank has a microbial infection attacking his brain. Which cell type would you expect to proliferate and be most active during this time?

Accepted Answer

A)   Astrocytes
B)   Microglia
C)   Oligodendrocytes
D)   Ependymal cells
E)   Schwann cellsF) C) and E)
G) A) and C)

Question 7

When two action potentials arrive simultaneously at two different presynaptic terminals that synapse with the same postsynaptic neuron,

Accepted Answer

A)   the direction of the action potential is reversed.
B)   temporal summation occurs.
C)   spatial summation occurs.
D)   hyperpolarization occurs.
E)   threshold is never reached.F) A) and C)
G) B) and E)

Question 8

Identify the statement that best differentiates gray matter and white matter.

Accepted Answer

A)   Gray matter consists of cell bodies and dendrites, whereas white matter consists mostly of myelinated axons.
B)   Gray matter consists of all parts of neurons, and white matter is mostly glial cells.
C)   Gray matter consists of bundles of axons, and white matter consists of groups of cell bodies and dendrites.D) A) and B)
E) All of the above

Question 9

Match the glial cell with its function.
-Oligodendrocyte

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) A) and B)

Question 10

The plasma membrane of a neuron is more permeable to K+ because

Accepted Answer

A)   of its positive electrical charge.
B)   there are more leak ion channels for K+ than Na+.
C)   protein molecules cannot exit through the plasma membrane.
D)   Ca2+ block Na+ and Cl− channels.
E)   there are more leak ion channels for Na+ than K+.F) D) and E)
G) A) and C)

Question 11

-Identify structure "D" on the neuron.
A) Schwann cell
B) Node of Ranvier
C) Neuron cell body (soma)
D) Dendrites
E) Axon

Accepted Answer

The answer of 
-Identify structure "D" on the neuron.
A) Schwann...

Question 12

Digestion of food is regulated by the

Accepted Answer

A)   sensory division.
B)   sympathetic division of the ANS.
C)   parasympathetic division of the ANS.
D)   somatic nervous system.
E)   None of the choices are correct.F) All of the above
G) C) and E)

Question 13

The sensory (afferent)  division of the peripheral nervous system

Accepted Answer

A)   transmits action potentials to sensory organs.
B)   conveys action potentials to the CNS.
C)   stimulates glands to release hormones.
D)   stimulates muscle contractions.
E)   does not involve sensory receptors.F) A) and B)
G) None of the above

Question 14

In order for local potentials to trigger an action potential, the membrane must reach a level called the ________.

Accepted Answer

A)   threshold
B)   resting membrane potential
C)   spike potential
D)   maximum potentialE) C) and D)
F) B) and C)

Question 15

What occurs during hyperpolarization of a neuron plasma membrane?

Accepted Answer

A)   Sodium ions are entering the cells.
B)   Sodium ions are leaving the cell.
C)   Potassium ions are entering the cell.
D)   Potassium ions are leaving the cell.
E)   Both sodium and potassium ions are leaving the cell.F) A) and E)
G) A) and D)

Question 16

The strength of a stimulus is communicated through

Accepted Answer

A)   changes in the magnitude of the action potential.
B)   the frequency of action potentials.
C)   the length of time action potentials are produced.
D)   Both "the frequency of action potentials" and "the length of time action potentials are produced" are correct.E) A) and B)
F) B) and C)

Question 17

A neuron with several dendrites and a single axon would be called a ________ neuron.

Accepted Answer

The answer of A neuron with several dendrites and a...

Question 18

-The figure illustrates changes in the membrane potential during an action potential. What does "B" represent?
A) Repolarization
B) Depolarization
C) Local potential
D) Threshold
E) Afterpotential

Accepted Answer

The answer of 
-The figure illustrates changes in the membrane...

Question 19

A myelin sheath is composed primarily of ________.

Accepted Answer

A)   lipids
B)   carbohydrates
C)   glycoproteins
D)   proteins
E)   polysaccharidesF) B) and E)
G) B) and D)

Question 20

-The figure illustrates changes in the membrane potential during an action potential. What does "E" represent?
A) Repolarization
B) Depolarization
C) Local potential
D) Threshold
E) Afterpotential

Accepted Answer

The answer of 
-The figure illustrates changes in the membrane...

Exam 11: Functional Organization of Nervous Tissue

Digestion of food is regulated by the

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Match the glial cell with its function. -Oligodendrocyte

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The sensory (afferent) division of the peripheral nervous system

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-The figure illustrates changes in the membrane potential during an action potential. What does "B" represent? A) Repolarization B) Depolarization C) Local potential D) Threshold E) Afterpotential

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-The figure illustrates changes in the membrane potential during an action potential. What does "E" represent? A) Repolarization B) Depolarization C) Local potential D) Threshold E) Afterpotential

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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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A neuron with several dendrites and a single axon would be called a ________ neuron.

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-Identify structure "D" on the neuron. A) Schwann cell B) Node of Ranvier C) Neuron cell body (soma) D) Dendrites E) Axon

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A myelin sheath is composed primarily of ________.

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The plasma membrane of a neuron is more permeable to K+ because

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Axons contain ________.

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In order for local potentials to trigger an action potential, the membrane must reach a level called the ________.

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The respiratory center of the brain (taking into account input from chemoreceptors, pulmonary stretch receptors, and higher centers of the brain to determine respiratory output) is an example of a ________ circuit.

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When two action potentials arrive simultaneously at two different presynaptic terminals that synapse with the same postsynaptic neuron,

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If you cut bundles of axons and their myelin sheaths in the PNS, you cut ________.

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What occurs during hyperpolarization of a neuron plasma membrane?

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Frank has a microbial infection attacking his brain. Which cell type would you expect to proliferate and be most active during this time?

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Match the glial cell with its function. -Microglia

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Identify the statement that best differentiates gray matter and white matter.

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The strength of a stimulus is communicated through

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The plasma membrane of a neuron is more permeable to K⁺ because

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