Question 1

The myelination of central and peripheral axons occurs rapidly through the first few years of life. How can this developmental process explain the improved motor abilities of infants and toddlers?

Accepted Answer

Without full myelination, information ab...

Question 2

Figure 11- 2 The Nerve Action Potential
Use Figure 11- 2 to answer the following questions:
-Which type of synapse is most common in the nervous system?

Accepted Answer

A)   electrical
B)   mechanical
C)   chemical
D)   processing
E)   radiative

Question 3

Figure 11- 2 The Nerve Action Potential
Use Figure 11- 2 to answer the following questions:
-Which area of the graph shows when passive depolarization is occurring?

Accepted Answer

A)   1
B)   2
C)   3
D)   4

Question 4

For which of the following functions do active neurons require a supply of ATP?

Accepted Answer

A)   powering the sodium- potassium exchange pump
B)   synthesis and reuptake of neurotransmitters
C)   axoplasmic transport
D)   all of the above
E)   A and C only

Question 5

The nervous tissue outside of the central nervous system composes the_____________nervous system.

Accepted Answer

The answer of The nervous tissue outside of the central...

Question 6

The efferent division of the peripheral nervous system innervates:

Accepted Answer

A)   glandular cells
B)   skeletal muscle cells
C)   smooth muscle cells
D)   heart muscle cells
E)   all of the above

Question 7

How would the absolute refractory period be affected if voltage- regulated sodium channels failed to inactivate?

Accepted Answer

A)   It would be basically unaffected.
B)   It would be much briefer.
C)   It would last indefinitely.

Question 8

Figure 11- 2 The Nerve Action Potential
Use Figure 11- 2 to answer the following questions:
-The ion that triggers the release of acetylcholine into the synaptic cleft is

Accepted Answer

A)   chloride.
B)   potassium.
C)   magnesium.
D)   calcium.
E)   sodium.

Question 9

Cholinergic synapses release the neurotransmitter

Accepted Answer

A)   serotonin.
B)   GABA.
C)   norepinephrine.
D)   acetylcholine.
E)   adrenalin.

Question 10

Clusters of RER and free ribosomes in neurons are called

Accepted Answer

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

Question 11

Which of the following is a function of neuroglia?

Accepted Answer

A)   regulate the composition of interstitial fluid
B)   provide a supportive framework
C)   act as phagocytes
D)   produce cerebrospinal fluid
E)   all of the above

Question 12

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

Accepted Answer

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

Question 13

Ion channels that are always open are______ called channels.

Accepted Answer

A)   active
B)   regulated
C)   gated
D)   local
E)   leak

Question 14

Neurons in which dendritic and axonal processes are continuous and the soma lies off to one side are called

Accepted Answer

A)   unipolar.
B)   tripolar.
C)   bipolar.
D)   multipolar.
E)   anaxonic.

Question 15

Raising the potassium ion concentration in the extracellular fluid surrounding a nerve cell will have which effect?

Accepted Answer

A)   depolarize it
B)   hyperpolarize it
C)   increase the magnitude of the potassium equilibrium potential
D)   decrease the magnitude of the potassium equilibrium potential
E)   both A and D

Question 16

Functions of astrocytes include all of the following, except

Accepted Answer

A)   responding to neural tissue damage.
B)   guiding neuron development.
C)   maintaining the blood- brain barrier.
D)   forming a three- dimensional framework for the CNS.
E)   conducting action potentials.

Question 17

The following are the steps involved in transmission at a cholinergic synapse. 1. Chemically gated sodium channels on the postsynaptic membrane are activated.
2)  Calcium ions enter the synaptic knob.
3)  Acetylcholinesterase hydrolyzes acetylcholine.
4)  An action potential depolarizes the synaptic knob at the presynaptic membrane.
5)  The synaptic knob reabsorbs choline.
6)  Acetylcholine is released from storage vesicles by exocytosis.
7)  Acetylcholine binds to receptors on the postsynaptic membrane.
8)  Calcium ions are removed from the cytoplasm of the synaptic knob.
The correct sequence for these events is

Accepted Answer

A)   2, 5, 4, 6, 7, 1, 8, 3.
B)   4, 2, 6, 7, 1, 8, 3, 5.
C)   6, 4, 2, 7, 1, 8, 3, 5.
D)   2, 4, 6, 7, 1, 8, 3, 5.
E)   4, 2, 6, 7, 8, 5, 3, 1.

Question 18

Figure 11- 1 The Neuron
Use Figure 11- 1 to answer the following questions:
-IPSPs inhibitory postsynaptic potentials)

Accepted Answer

A)   are local depolarizations.
B)   block the efflux of potassium ions.
C)   increase membrane permeability to sodium ions.
D)   are local hyperpolarizations.
E)   block the efflux of calcium ions.

Question 19

The site in the neuron where EPSPs and IPSPs are integrated is the

Accepted Answer

A)   axon hillock.
B)   dendritic membrane.
C)   chemical synapse.
D)   electrical synapse.
E)   synaptic knob.

Question 20

_________ are nerves that connect to the brain

Accepted Answer

The answer of _________ are nerves that connect to the...

Exam 11: Neural Tissue

Correct Answer
verified

Clusters of RER and free ribosomes in neurons are called

Correct Answer
verified

Figure 11- 1 The Neuron Use Figure 11- 1 to answer the following questions: -IPSPs inhibitory postsynaptic potentials)

Correct Answer
verified

Functions of astrocytes include all of the following, except

Correct Answer
verified

Neurons in which dendritic and axonal processes are continuous and the soma lies off to one side are called

Correct Answer
verified

The nervous tissue outside of the central nervous system composes the_____________nervous system.

Correct Answer
verified

How would the absolute refractory period be affected if voltage- regulated sodium channels failed to inactivate?

Correct Answer
verified

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

Correct Answer
verified

Cholinergic synapses release the neurotransmitter

Correct Answer
verified

The myelination of central and peripheral axons occurs rapidly through the first few years of life. How can this developmental process explain the improved motor abilities of infants and toddlers?

Correct Answer
verified
Without full myelination, information ab...
View Answer

Raising the potassium ion concentration in the extracellular fluid surrounding a nerve cell will have which effect?

Correct Answer
verified

Figure 11- 2 The Nerve Action Potential Use Figure 11- 2 to answer the following questions: -Which type of synapse is most common in the nervous system?

Correct Answer
verified

For which of the following functions do active neurons require a supply of ATP?

Correct Answer
verified

Figure 11- 2 The Nerve Action Potential Use Figure 11- 2 to answer the following questions: -Which area of the graph shows when passive depolarization is occurring?

Correct Answer
verified

Ion channels that are always open are______ called channels.

Correct Answer
verified

Figure 11- 2 The Nerve Action Potential Use Figure 11- 2 to answer the following questions: -The ion that triggers the release of acetylcholine into the synaptic cleft is

Correct Answer
verified

The efferent division of the peripheral nervous system innervates:

Correct Answer
verified

_________ are nerves that connect to the brain

Correct Answer
verified

The site in the neuron where EPSPs and IPSPs are integrated is the

Correct Answer
verified

Which of the following is a function of neuroglia?

Correct Answer
verified

Exam 11: Neural Tissue

Correct AnswerverifiedShow Answer

Clusters of RER and free ribosomes in neurons are called

Correct AnswerverifiedShow Answer

Figure 11- 1 The Neuron Use Figure 11- 1 to answer the following questions: -IPSPs inhibitory postsynaptic potentials)

Correct AnswerverifiedShow Answer

Functions of astrocytes include all of the following, except

Correct AnswerverifiedShow Answer

Neurons in which dendritic and axonal processes are continuous and the soma lies off to one side are called

Correct AnswerverifiedShow Answer

The nervous tissue outside of the central nervous system composes the_____________nervous system.

Correct AnswerverifiedShow Answer

How would the absolute refractory period be affected if voltage- regulated sodium channels failed to inactivate?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Cholinergic synapses release the neurotransmitter

Correct AnswerverifiedShow Answer

The myelination of central and peripheral axons occurs rapidly through the first few years of life. How can this developmental process explain the improved motor abilities of infants and toddlers?

Correct AnswerverifiedWithout full myelination, information ab...View AnswerShow Answer

Raising the potassium ion concentration in the extracellular fluid surrounding a nerve cell will have which effect?

Correct AnswerverifiedShow Answer

Figure 11- 2 The Nerve Action Potential Use Figure 11- 2 to answer the following questions: -Which type of synapse is most common in the nervous system?

Correct AnswerverifiedShow Answer

For which of the following functions do active neurons require a supply of ATP?

Correct AnswerverifiedShow Answer

Figure 11- 2 The Nerve Action Potential Use Figure 11- 2 to answer the following questions: -Which area of the graph shows when passive depolarization is occurring?

Correct AnswerverifiedShow Answer

Ion channels that are always open are______ called channels.

Correct AnswerverifiedShow Answer

Figure 11- 2 The Nerve Action Potential Use Figure 11- 2 to answer the following questions: -The ion that triggers the release of acetylcholine into the synaptic cleft is

Correct AnswerverifiedShow Answer

The efferent division of the peripheral nervous system innervates:

Correct AnswerverifiedShow Answer

_________ are nerves that connect to the brain

Correct AnswerverifiedShow Answer

The site in the neuron where EPSPs and IPSPs are integrated is the

Correct AnswerverifiedShow Answer

Which of the following is a function of neuroglia?

Correct AnswerverifiedShow Answer

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
Without full myelination, information ab...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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