Question 1

Summation that results from the cumulative effect of multiple synapses at multiple places on the neuron is designated

Accepted Answer

A)  spatial summation.
B)  temporal summation.
C)  inhibition of the impulse.
D)  hyperpolarization.
E)  impulse transmission.F) A) and B)
G) B) and D)

Question 2

The part of the peripheral nervous system that carries sensory information to the CNS is designated

Accepted Answer

A)  motor.
B)  afferent.
C)  efferent.
D)  autonomic.
E)  somatic.F) B) and C)
G) A) and D)

Question 3

________ neurons are short,with a cell body between dendrite and axon,and occur in special sense organs.

Accepted Answer

A)  Multipolar
B)  Anaxonic
C)  Unipolar
D)  Bipolar
E)  MotorF) B) and E)
G) None of the above

Question 4

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 answers are correct.F) D) and E)
G) A) and E)

Question 5

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 norma...

Question 6

The ion that triggers the release of acetylcholine into the synaptic cleft is

Accepted Answer

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

Question 7

How does blocking retrograde axoplasmic transport in an axon affect the activity of a neuron?

Accepted Answer

A)  The neuron becomes unable to produce neurotransmitters.
B)  The neuron becomes unable to produce action potentials.
C)  The soma becomes unable to export products to the synaptic terminals.
D)  The soma becomes unable to respond to changes in the distal end of the axon.
E)  The neuron becomes unable to depolarize when stimulated.F) D) and E)
G) A) and E)

Question 8

At a(n)________ synapse,a neurotransmitter is released to stimulate the postsynaptic membrane.

Accepted Answer

The answer of At a(n)________ synapse,a neurotransmitter is released to...

Question 9

Presynaptic facilitation by serotonin is caused by

Accepted Answer

A)  increased extracellular concentration of sodium ion.
B)  increased extracellular concentration of potassium ion.
C)  blockage of calcium channels in the presynaptic membrane.
D)  calcium channels in the presynaptic membrane remaining open longer.
E)  temporal summation.F) D) and E)
G) None of the above

Question 10

Voltage-gated sodium channels have both an activation gate and a(n) ________ gate.

Accepted Answer

A)  inactivation
B)  ion
C)  swinging
D)  repolarization
E)  thresholdF) A) and E)
G) B) and E)

Question 11

Extensive damage to oligodendrocytes in the CNS could result in

Accepted Answer

A)  loss of the structural framework of the brain.
B)  a breakdown of the blood-brain barrier.
C)  inability to produce scar tissue at the site of an injury.
D)  decreased production of cerebrospinal fluid.
E)  loss of sensation and motor control.F) All of the above
G) A) and B)

Question 12

The sensory loss and muscle weakness associated with multiple sclerosis are a consequence of ________.

Accepted Answer

The answer of The sensory loss and muscle weakness associated...

Question 13

Adrenergic synapses release the neurotransmitter

Accepted Answer

A)  acetylcholine.
B)  norepinephrine.
C)  dopamine.
D)  serotonin.
E)  GABA.F) D) and E)
G) B) and E)

Question 14

Sensory information from skeletal muscles travels over ________ fibers.

Accepted Answer

A)  type A
B)  type B
C)  type C
D)  type D
E)  type EF) B) and C)
G) A) and C)

Question 15

Figure 12-2 The Nerve Action Potential
Use Figure 12-2 to answer the following questions:
-Which area of the graph shows when chemically-gated sodium channels are open?

Accepted Answer

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

Question 16

Type ________ fibers have the largest diameter axons.

Accepted Answer

A)  S
B)  F
C)  A
D)  B
E)  CF) B) and D)
G) A) and E)

Question 17

In a(n) ________ neuron,the dendrites and axon are continuous or fused.

Accepted Answer

A)  multipolar
B)  anaxonic
C)  unipolar
D)  bipolar
E)  interneuronF) None of the above
G) D) and E)

Question 18

The site of intercellular communication between a neuron and another cell is the

Accepted Answer

A)  telodendria.
B)  synaptic terminals.
C)  collateral.
D)  hillock.
E)  synapse.F) A) and C)
G) None of the above

Question 19

________ neurons are the most common class in the CNS.

Accepted Answer

A)  Multipolar
B)  Anaxonic
C)  Unipolar
D)  Bipolar
E)  SensoryF) C) and E)
G) A) and B)

Question 20

Figure 12-1 The Neuron
Use Figure 12-1 to answer the following questions:
-What is contained inside the structure labeled "5" ?

Accepted Answer

A)  neuroglia
B)  sodium ions
C)  acetylcholinesterase
D)  calcium ions
E)  neurotransmitter moleculesF) A) and B)
G) None of the above

Exam 12: Neural Tissue

In a(n) ________ neuron,the dendrites and axon are continuous or fused.

Correct AnswerverifiedShow Answer

Figure 12-2 The Nerve Action Potential Use Figure 12-2 to answer the following questions: -Which area of the graph shows when chemically-gated sodium channels are open?

Correct AnswerverifiedShow Answer

The site of intercellular communication between a neuron and another cell is the

Correct AnswerverifiedShow Answer

________ neurons are short,with a cell body between dendrite and axon,and occur in special sense organs.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

________ neurons are the most common class in the CNS.

Correct AnswerverifiedShow Answer

Adrenergic synapses release the neurotransmitter

Correct AnswerverifiedShow Answer

Presynaptic facilitation by serotonin is caused by

Correct AnswerverifiedShow Answer

Extensive damage to oligodendrocytes in the CNS could result in

Correct AnswerverifiedShow Answer

The ion that triggers the release of acetylcholine into the synaptic cleft is

Correct AnswerverifiedShow Answer

Type ________ fibers have the largest diameter axons.

Correct AnswerverifiedShow Answer

Summation that results from the cumulative effect of multiple synapses at multiple places on the neuron is designated

Correct AnswerverifiedShow Answer

Figure 12-1 The Neuron Use Figure 12-1 to answer the following questions: -What is contained inside the structure labeled "5" ?

Correct AnswerverifiedShow Answer

Voltage-gated sodium channels have both an activation gate and a(n) ________ gate.

Correct AnswerverifiedShow Answer

At a(n)________ synapse,a neurotransmitter is released to stimulate the postsynaptic membrane.

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 norma...View AnswerShow Answer

How does blocking retrograde axoplasmic transport in an axon affect the activity of a neuron?

Correct AnswerverifiedShow Answer

Sensory information from skeletal muscles travels over ________ fibers.

Correct AnswerverifiedShow Answer

The sensory loss and muscle weakness associated with multiple sclerosis are a consequence of ________.

Correct AnswerverifiedShow Answer

The part of the peripheral nervous system that carries sensory information to the CNS is designated

Correct AnswerverifiedShow Answer

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Initially,the recording would show norma...
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