Question 1

________ neurons are small and have no anatomical features that distinguish dendrites from axons.

Accepted Answer

A)   Multipolar
B)   Anaxonic
C)   Unipolar
D)   Bipolar
E)   none of the aboveF) C) and E)
G) C) and D)

Question 2

The separation of plus and negative charges across the membrane creates a ________ difference, or voltage.

Accepted Answer

The answer of The separation of plus and negative charges...

Question 3

The period from when an action potential begins until normal excitability returns is known as the ________ period.

Accepted Answer

The answer of The period from when an action potential...

Question 4

________ channels open or close in response to physical distortion of the membrane surface.

Accepted Answer

A)   Voltage-gated
B)   Chemically gated
C)   Active
D)   Mechanically gated
E)   LeakF) A) and B)
G) A) and C)

Question 5

Figure 11-1 The Neuron
Use Figure 11-1 to answer the following questions:
-Which part of the neuron can conduct an action potential?

Accepted Answer

A)   1
B)   1 and 2
C)   2 and 3
D)   3 and 4
E)   3, 4, and 5F) A) and C)
G) A) and B)

Question 6

The plasma membrane of an axon is called the ________.

Accepted Answer

The answer of The plasma membrane of an axon is...

Question 7

If the permeability of a resting axon to sodium ion increases,

Accepted Answer

A)   the membrane potential will depolarize.
B)   the membrane potential will hyperpolarize.
C)   inward movement of sodium ions will increase.
D)   outward movement of sodium ions will decrease.
E)   both the inward movement of sodium ions will increase and the membrane potential will depolarize.F) B) and D)
G) A) and E)

Question 8

Clusters of RER and free ribosomes in neurons are called

Accepted Answer

A)   neurofilaments.
B)   neurofibrils.
C)   perikaryon.
D)   Nissl bodies.
E)   microglia.F) A) and B)
G) A) and E)

Question 9

Which of the following would not have an effect on synaptic function?

Accepted Answer

A)   interfere with neurotransmitter synthesis
B)   interfere with neurotransmitter reuptake
C)   prevent neurotransmitter inactivation
D)   block neurotransmitter binding to receptors
E)   All of the above would affect synaptic function.F) A) and B)
G) A) and D)

Question 10

Graded potentials

Accepted Answer

A)   produce an effect that increases with distance from the point of stimulation.
B)   produce an effect that spreads actively across the membrane surface without diminishing.
C)   may be either a depolarization or a hyperpolarization.
D)   are often all-or-none.
E)   always cause repolarization.F) A) and D)
G) A) and C)

Question 11

If the potassium permeability of a resting neuron increases above the resting permeability, what effect will this have on the transmembrane potential?

Accepted Answer

A)   The inside of the membrane will become more positive.
B)   The inside of the membrane will become more negative.
C)   There will be almost no effect on transmembrane potential.
D)   The membrane will become depolarized.
E)   none of the aboveF) A) and B)
G) A) and E)

Question 12

In a(n) ________ synapse, current flows directly between cells.

Accepted Answer

The answer of In a(n) ________ synapse, current flows directly...

Question 13

Ions can move across the plasma membrane in which of the following ways?

Accepted Answer

A)   through voltage-gated channels as in the action potential
B)   through passive or leak channels
C)   by ATP-dependent ion pumps like the sodium-potassium exchange pump
D)   through chemically-gated channels as in neuromuscular transmission
E)   all of the aboveF) A) and B)
G) B) and E)

Question 14

The period during which an excitable membrane cannot respond to further stimulation is the ________.

Accepted Answer

absolute r...

Question 15

________ line the brain ventricles and spinal canal.

Accepted Answer

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

Question 16

A drug that blocks ATP production is introduced into an isolated axon preparation. The axon is then repeatedly stimulated, and recordings are made of the response. What effects would you expect to observe?

Accepted Answer

Initially, the recording would show norm...

Question 17

Small, wandering cells that engulf cell debris and pathogens in the CNS are called

Accepted Answer

A)   astrocytes.
B)   satellite cells.
C)   oligodendrocytes.
D)   microglia.
E)   ependymal cells.F) A) and B)
G) D) and E)

Question 18

Opening of sodium channels in the axon membrane causes

Accepted Answer

A)   depolarization.
B)   repolarization.
C)   hyperpolarization.
D)   increased positive charge inside the membrane.
E)   both depolarization and increased positive charge inside the membrane.F) D) and E)
G) A) and B)

Question 19

Functions of astrocytes include all of the following, except

Accepted Answer

A)   maintaining the blood-brain barrier.
B)   conducting action potentials.
C)   guiding neuron development.
D)   responding to neural tissue damage.
E)   forming a three-dimensional framework for the CNS.F) B) and C)
G) None of the above

Question 20

The same ________ can have different effects depending on the properties of the ________.

Accepted Answer

A)   neurotransmitter; receptor
B)   receptor; neurotransmitter
C)   substrate; receptor
D)   hormone; neurotransmitter
E)   propagation; neurotransmitterF) B) and E)
G) A) and B)

Exam 11: Neural Tissue

The period during which an excitable membrane cannot respond to further stimulation is the ________.

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________ channels open or close in response to physical distortion of the membrane surface.

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Functions of astrocytes include all of the following, except

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________ neurons are small and have no anatomical features that distinguish dendrites from axons.

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The plasma membrane of an axon is called the ________.

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In a(n) ________ synapse, current flows directly between cells.

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If the potassium permeability of a resting neuron increases above the resting permeability, what effect will this have on the transmembrane potential?

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Small, wandering cells that engulf cell debris and pathogens in the CNS are called

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Clusters of RER and free ribosomes in neurons are called

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The same ________ can have different effects depending on the properties of the ________.

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Graded potentials

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Figure 11-1 The Neuron Use Figure 11-1 to answer the following questions: -Which part of the neuron can conduct an action potential?

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Opening of sodium channels in the axon membrane causes

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If the permeability of a resting axon to sodium ion increases,

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The separation of plus and negative charges across the membrane creates a ________ difference, or voltage.

Correct AnswerverifiedShow Answer

The period from when an action potential begins until normal excitability returns is known as the ________ period.

Correct AnswerverifiedShow Answer

A drug that blocks ATP production is introduced into an isolated axon preparation. The axon is then repeatedly stimulated, and recordings are made of the response. What effects would you expect to observe?

Correct AnswerverifiedInitially, the recording would show norm...View AnswerShow Answer

________ line the brain ventricles and spinal canal.

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Which of the following would not have an effect on synaptic function?

Correct AnswerverifiedShow Answer

Ions can move across the plasma membrane in which of the following ways?

Correct AnswerverifiedShow Answer

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The same can have different effects depending on the properties of the .

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Initially, the recording would show norm...
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