Question 1

Based on function, the vast majority of neurons are

Accepted Answer

A)  sensory neurons. 
B)  motor neurons. 
C)  unipolar neurons. 
D)  bipolar neurons. 
E)  interneurons. 
A)  sensory neurons. 
B)  motor neurons. 
C)  unipolar neurons. 
D)  bipolar neurons. 
E)  interneurons. E

Question 2

The axon hillock makes up the ________ segment of a neuron.

Accepted Answer

initial

Question 3

Of the two types of synapses, based on mode of communication, which is less common but allows faster signal transmission?

Accepted Answer

A)  Chemical synapse 
B)  Mechanical synapse 
C)  Physical synapse 
D)  Magnetic synapse 
E)  Electrical synapse 
A)  Chemical synapse 
B)  Mechanical synapse 
C)  Physical synapse 
D)  Magnetic synapse 
E)  Electrical synapse E

Question 4

In a myelinated axon, the greatest concentration of voltage-gated ion channels is in the

Accepted Answer

A)  myelinated regions. 
B)  neurofibril nodes. 
A)  myelinated regions. 
B)  neurofibril nodes.

Question 5

When a nerve impulse reaches the transmissive segment of a neuron,

Accepted Answer

A)  calcium is pumped into the neuron and neurotransmitter diffuses out through channels. 
B)  calcium is released from the neuron along with neurotransmitter from synaptic vesicles. 
C)  calcium diffuses into the neuron and neurotransmitter is released by exocytosis. 
D)  calcium and neurotransmitter diffuse into the synaptic knob. 
E)  calcium is immediately pumped out of the neuron and vesicles of neurotransmitter undergo phagocytosis. 
A)  calcium is pumped into the neuron and neurotransmitter diffuses out through channels. 
B)  calcium is released from the neuron along with neurotransmitter from synaptic vesicles. 
C)  calcium diffuses into the neuron and neurotransmitter is released by exocytosis. 
D)  calcium and neurotransmitter diffuse into the synaptic knob. 
E)  calcium is immediately pumped out of the neuron and vesicles of neurotransmitter undergo phagocytosis.

Question 6

What is the most abundant glial cell in the CNS?

Accepted Answer

A)  Astrocyte 
B)  Ependymal cell 
C)  Neurolemmocyte 
D)  Microglial cell 
E)  Oligodendrocyte 
A)  Astrocyte 
B)  Ependymal cell 
C)  Neurolemmocyte 
D)  Microglial cell 
E)  Oligodendrocyte

Question 7

Which occurs first?

Accepted Answer

A)  Absolute refractory period 
B)  Relative refractory period 
A)  Absolute refractory period 
B)  Relative refractory period

Question 8

You walk into a restaurant and amidst the sights, sounds, and smells of food preparation, you notice that you have begun to salivate. This is evidence that a particular neuronal circuit has been activated. Which one?

Accepted Answer

A)  Converging 
B)  Diverging 
C)  Reverberating 
D)  Parallel-after-discharge 
E)  None of the choices is correct. 
A)  Converging 
B)  Diverging 
C)  Reverberating 
D)  Parallel-after-discharge 
E)  None of the choices is correct.

Question 9

When a neurotransmitter causes the opening of chemically gated potassium channels on the postsynaptic cell, the postsynaptic potential that results is an

Accepted Answer

A)  EPSP, which is a depolarization. 
B)  EPSP, which is a hyperpolarization 
C)  IPSP, which is a depolarization. 
D)  IPSP, which is a hyperpolarization. 
A)  EPSP, which is a depolarization. 
B)  EPSP, which is a hyperpolarization 
C)  IPSP, which is a depolarization. 
D)  IPSP, which is a hyperpolarization.

Question 10

Saltatory conduction occurs in

Accepted Answer

A)  myelinated axons, where action potentials occur only at neurofibril nodes. 
B)  myelinated axons, where action potentials occur only under the myelin sheath. 
C)  myelinated axons, where action potentials occur continuously down the entire axon. 
D)  unmyelinated axons, where action potentials occur continuously down the entire axon. 
E)  the axon terminal, where full-size action potentials occur at the hillock. 
A)  myelinated axons, where action potentials occur only at neurofibril nodes. 
B)  myelinated axons, where action potentials occur only under the myelin sheath. 
C)  myelinated axons, where action potentials occur continuously down the entire axon. 
D)  unmyelinated axons, where action potentials occur continuously down the entire axon. 
E)  the axon terminal, where full-size action potentials occur at the hillock.

Question 11

Voltage-gated sodium channels at a neuron's initial segment are triggered to open when the membrane becomes more positive.

Accepted Answer

A) True 
 B)False

Question 12

What type of circuit would you use to solve a higher-order mathematical problem?

Accepted Answer

A)  Converging 
B)  Diverging 
C)  Reverberating 
D)  Parallel-after-discharge 
E)  None of the choices is correct. 
A)  Converging 
B)  Diverging 
C)  Reverberating 
D)  Parallel-after-discharge 
E)  None of the choices is correct.

Question 13

The glial cell that protects neuron cell bodies located within ganglia is the

Accepted Answer

A)  satellite cell. 
B)  ependymal cell. 
C)  neurolemmocyte. 
D)  astrocyte. 
E)  oligodendrocyte. 
A)  satellite cell. 
B)  ependymal cell. 
C)  neurolemmocyte. 
D)  astrocyte. 
E)  oligodendrocyte.

Question 14

The type of voltage-gated channel that possesses an inactivation gate that temporarily closes after the channel is active is the

Accepted Answer

A)  voltage-gated potassium channel. 
B)  voltage-gated sodium channel. 
C)  voltage-gated calcium channel. 
D)  voltage-gated chloride channel. 
A)  voltage-gated potassium channel. 
B)  voltage-gated sodium channel. 
C)  voltage-gated calcium channel. 
D)  voltage-gated chloride channel.

Question 15

A depolarization is when the inside of a neuron becomes ________ the resting membrane potential.

Accepted Answer

A)  more negative than 
B)  less negative than 
C)  closer to 
A)  more negative than 
B)  less negative than 
C)  closer to

Question 16

The nervous system contains more neurons than glial cells.

Accepted Answer

A) True 
 B)False

Question 17

A sensory neuron detecting an intense stimulus will generate action potentials of greater strength as compared to a sensory neuron detecting a weak stimulus.

Accepted Answer

A) True 
 B)False

Question 18

The function of myelin is to

Accepted Answer

A)  block the transmission of a nerve impulse. 
B)  provide points of attachment for nerve threads. 
C)  produce faster nerve impulse propagation. 
D)  produce slow but continuous impulse conduction. 
A)  block the transmission of a nerve impulse. 
B)  provide points of attachment for nerve threads. 
C)  produce faster nerve impulse propagation. 
D)  produce slow but continuous impulse conduction.

Question 19

Which statement is true regarding the action of an oligodendrocyte?

Accepted Answer

A)  Each oligodendrocyte can form a myelin sheath around many axons simultaneously. 
B)  An oligodendrocyte is responsible for forming part of the blood-brain barrier. 
C)  Oligodendrocytes function only within the PNS. 
D)  Each oligodendrocyte can wrap only a 1-mm portion of a single axon. 
E)  A neurolemmocyte attacks pathogens. 
A)  Each oligodendrocyte can form a myelin sheath around many axons simultaneously. 
B)  An oligodendrocyte is responsible for forming part of the blood-brain barrier. 
C)  Oligodendrocytes function only within the PNS. 
D)  Each oligodendrocyte can wrap only a 1-mm portion of a single axon. 
E)  A neurolemmocyte attacks pathogens.

Question 20

A postsynaptic potential is a graded potential.

Accepted Answer

A) True 
 B)False

Exam 12: Nervous System: Nervous Tissue

Based on function, the vast majority of neurons are

The axon hillock makes up the ________ segment of a neuron.

Of the two types of synapses, based on mode of communication, which is less common but allows faster signal transmission?

In a myelinated axon, the greatest concentration of voltage-gated ion channels is in the

When a nerve impulse reaches the transmissive segment of a neuron,

What is the most abundant glial cell in the CNS?

Which occurs first?

You walk into a restaurant and amidst the sights, sounds, and smells of food preparation, you notice that you have begun to salivate. This is evidence that a particular neuronal circuit has been activated. Which one?

When a neurotransmitter causes the opening of chemically gated potassium channels on the postsynaptic cell, the postsynaptic potential that results is an

Saltatory conduction occurs in

Voltage-gated sodium channels at a neuron's initial segment are triggered to open when the membrane becomes more positive.

What type of circuit would you use to solve a higher-order mathematical problem?

The glial cell that protects neuron cell bodies located within ganglia is the

The type of voltage-gated channel that possesses an inactivation gate that temporarily closes after the channel is active is the

A depolarization is when the inside of a neuron becomes ________ the resting membrane potential.

The nervous system contains more neurons than glial cells.

A sensory neuron detecting an intense stimulus will generate action potentials of greater strength as compared to a sensory neuron detecting a weak stimulus.

The function of myelin is to

Which statement is true regarding the action of an oligodendrocyte?

A postsynaptic potential is a graded potential.

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