Question 1

Classify neurons based on their function.

Accepted Answer

A)  Neurons are classified functionally as sensory,interneurons,or motor neurons.
B)  Neurons are classified functionally as central,peripheral,or enteric neurons.
C)  Neurons are classified functionally as anaxonic,bipolar,unipolar,or multipolar.
D)  Neurons are classified functionally as anaxonic or axonic.
E)  Neurons are classified functionally as sympathetic or parasympathetic neurons.F) A) and E)
G) D) and E)

Question 2

In the process of continuous propagation,all of the following are true except

Accepted Answer

A)  the action potential is triggered by graded depolarization of the initial segment.
B)  at threshold,sodium channels begin to open rapidly.
C)  local currents depolarize the region just adjacent to the active zone.
D)  depolarization of the axonal membrane only occurs at nodes.
E)  each step takes about one millisecond.F) B) and C)
G) C) and D)

Question 3

Figure 11-1
-The structure labeled "2" is a

Accepted Answer

A)  cell body.
B)  dendrite.
C)  axon hillock.
D)  Nissl body.E) A) and D)
F) All of the above

Question 4

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

Accepted Answer

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

Question 5

Describe the role of regulatory neurons.

Accepted Answer

A)  Regulatory neurons act as part of the defense system to protect the presynaptic neurons from pathogens.
B)  Regulatory neurons block presynaptic neurons from drugs and other chemicals in the blood.
C)  Regulatory neurons assist in the repair of injured neurons.
D)  Regulatory neurons speed the propagation of action potentials between presynaptic neurons and postsynaptic neurons.
E)  Regulatory neurons facilitate or inhibit the activities of presynaptic neurons by affecting the membrane of the cell body or by altering the sensitivity of axon terminals.F) B) and C)
G) A) and C)

Question 6

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.
What is the proper sequence of these events?

Accepted Answer

A)  4,2,6,7,8,5,3,1
B)  4,2,6,7,1,8,3,5
C)  2,4,6,7,1,8,3,5
D)  2,5,4,6,7,1,8,3
E)  6,4,2,7,1,8,3,5F) A) and E)
G) A) and B)

Question 7

Regions of the CNS with an abundance of myelinated axons constitute the ________ matter.

Accepted Answer

A)  white
B)  grey
C)  clear
D)  dark
E)  yellowF) A) and C)
G) A) and B)

Question 8

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) C) and D)
G) B) and C)

Question 9

Compare temporal summation with spatial summation.

Accepted Answer

Temporal summation is the addition of a ...

Question 10

An action potential traveling along the entire length of an axon demonstrates ________ propagation.

Accepted Answer

A)  relative
B)  saltatory
C)  continuous
D)  graded
E)  degradedF) C) and D)
G) A) and B)

Question 11

After acetylcholinesterase acts,the synaptic knob

Accepted Answer

A)  reabsorbs the acetylcholine.
B)  reabsorbs the acetate.
C)  reabsorbs the choline.
D)  degrades the acetate.
E)  degrades the choline.F) All of the above
G) B) and C)

Question 12

The ________ nervous system is composed of the brain and spinal cord.

Accepted Answer

A)  autonomic
B)  peripheral
C)  central
D)  efferent
E)  afferentF) C) and D)
G) A) and B)

Question 13

A shift of the resting transmembrane potential toward 0 mV is called

Accepted Answer

A)  depolarization.
B)  repolarization.
C)  hyperpolarization.
D)  non-polarization.
E)  hypopolarization.F) B) and C)
G) C) and E)

Question 14

After a stroke,what type of glial cell accumulates within the affected brain region?

Accepted Answer

A)  Schwann cells
B)  satellite cells
C)  oligodendrocytes
D)  microglia
E)  ependymal cellsF) A) and B)
G) A) and C)

Question 15

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

Accepted Answer

A)  chemical synapse.
B)  electrical synapse.
C)  axon hillock.
D)  dendritic membrane.
E)  synaptic knob.F) C) and D)
G) None of the above

Question 16

Integral membrane proteins that connect electrical synapses are called

Accepted Answer

A)  gap junctions.
B)  receptors.
C)  desmosomes.
D)  sodium channels.
E)  leak channels.F) B) and D)
G) A) and D)

Question 17

The equilibrium potential for potassium ions occurs at approximately

Accepted Answer

A)  -90 mV.
B)  -70 mV.
C)  +66 mV.
D)  0 mV.
E)  -55 mV.F) A) and B)
G) C) and D)

Question 18

The all-or-none principle states that

Accepted Answer

A)  all stimuli will produce identical action potentials.
B)  all stimuli great enough to bring the membrane to threshold will produce identical action potentials.
C)  the greater the magnitude of the stimuli,the greater the magnitude of the action potential.
D)  only sensory stimuli can activate action potentials.
E)  only motor stimuli can activate action potentials.F) C) and D)
G) None of the above

Question 19

Which of the following statements about the action potential is false?

Accepted Answer

A)  The rapid depolarization phase is caused by the entry of potassium ions.
B)  During the repolarization phase,sodium channels close and potassium channels open.
C)  During the depolarization phase,membrane potential becomes positive.
D)  In the hyperpolarization phase,membrane potential approaches the potassium equilibrium potential.
E)  The rapid depolarization phase is caused by the entry of sodium ions.F) A) and E)
G) A) and B)

Question 20

The most abundant class of neuron in the central nervous system is

Accepted Answer

A)  anaxonic.
B)  bipolar.
C)  multipolar.
D)  pseudopolar.
E)  unipolar.F) B) and E)
G) A) and C)

Exam 11: Nervous Tissue

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

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

After a stroke,what type of glial cell accumulates within the affected brain region?

Correct Answer
verified

Compare temporal summation with spatial summation.

Correct Answer
verified
Temporal summation is the addition of a ...
View Answer

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

Correct Answer
verified

Integral membrane proteins that connect electrical synapses are called

Correct Answer
verified

Which of the following statements about the action potential is false?

Correct Answer
verified

An action potential traveling along the entire length of an axon demonstrates ________ propagation.

Correct Answer
verified

Classify neurons based on their function.

Correct Answer
verified

After acetylcholinesterase acts,the synaptic knob

Correct Answer
verified

The most abundant class of neuron in the central nervous system is

Correct Answer
verified

Describe the role of regulatory neurons.

Correct Answer
verified

Figure 11-1 -The structure labeled "2" is a

Correct Answer
verified

A shift of the resting transmembrane potential toward 0 mV is called

Correct Answer
verified

The all-or-none principle states that

Correct Answer
verified

Correct Answer
verified

In the process of continuous propagation,all of the following are true except

Correct Answer
verified

Regions of the CNS with an abundance of myelinated axons constitute the ________ matter.

Correct Answer
verified

The equilibrium potential for potassium ions occurs at approximately

Correct Answer
verified

The ________ nervous system is composed of the brain and spinal cord.

Correct Answer
verified

Exam 11: Nervous Tissue

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

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

After a stroke,what type of glial cell accumulates within the affected brain region?

Correct AnswerverifiedShow Answer

Compare temporal summation with spatial summation.

Correct AnswerverifiedTemporal summation is the addition of a ...View AnswerShow Answer

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

Correct AnswerverifiedShow Answer

Integral membrane proteins that connect electrical synapses are called

Correct AnswerverifiedShow Answer

Which of the following statements about the action potential is false?

Correct AnswerverifiedShow Answer

An action potential traveling along the entire length of an axon demonstrates ________ propagation.

Correct AnswerverifiedShow Answer

Classify neurons based on their function.

Correct AnswerverifiedShow Answer

After acetylcholinesterase acts,the synaptic knob

Correct AnswerverifiedShow Answer

The most abundant class of neuron in the central nervous system is

Correct AnswerverifiedShow Answer

Describe the role of regulatory neurons.

Correct AnswerverifiedShow Answer

Figure 11-1 -The structure labeled "2" is a

Correct AnswerverifiedShow Answer

A shift of the resting transmembrane potential toward 0 mV is called

Correct AnswerverifiedShow Answer

The all-or-none principle states that

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

In the process of continuous propagation,all of the following are true except

Correct AnswerverifiedShow Answer

Regions of the CNS with an abundance of myelinated axons constitute the ________ matter.

Correct AnswerverifiedShow Answer

The equilibrium potential for potassium ions occurs at approximately

Correct AnswerverifiedShow Answer

The ________ nervous system is composed of the brain and spinal cord.

Correct AnswerverifiedShow Answer

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verified
Temporal summation is the addition of a ...
View Answer

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