Question 1

Wallerian degeneration refers to

Accepted Answer

A)  degeneration of the proximal end of axon and myelin sheath after neural injury. 
B)  degeneration of the distal end of axon and myelin sheath after neural injury. 
C)  break of Nissl bodies after neural injury. 
D)  plasticity of neuron. 
E)  none of these choices. 
A)  degeneration of the proximal end of axon and myelin sheath after neural injury. 
B)  degeneration of the distal end of axon and myelin sheath after neural injury. 
C)  break of Nissl bodies after neural injury. 
D)  plasticity of neuron. 
E)  none of these choices.

Question 2

The peripheral nervous system can be divided into:

Accepted Answer

A)  somatic nervous system 
B)  autonomic nervous system 
C)  enteric nervous system 
D)  both somatic nervous system and autonomic nervous system 
E)  all of these choices 
A)  somatic nervous system 
B)  autonomic nervous system 
C)  enteric nervous system 
D)  both somatic nervous system and autonomic nervous system 
E)  all of these choices

Question 3

Which type of axons has the largest diameter?

Accepted Answer

A)  A fibers 
B)  B fibers 
C)  C fibers 
D)  A and B fibers 
E)  B and C fibers 
A)  A fibers 
B)  B fibers 
C)  C fibers 
D)  A and B fibers 
E)  B and C fibers

Question 4

Which of the following terms is used to describe a type of synapse?

Accepted Answer

A)  axodendritic 
B)  axosomatic 
C)  axoaxonic 
D)  none of these choices 
E)  all of these choices 
A)  axodendritic 
B)  axosomatic 
C)  axoaxonic 
D)  none of these choices 
E)  all of these choices

Question 5

Briefly describe what causes the depolarizing phase.

Accepted Answer

Voltage gated Na⁺ channels open

Question 6

Which of the following types of electrical signals allow rapid long-distance communication within the nervous system?

Accepted Answer

A)  resting potential 
B)  nerve action potential 
C)  muscle action potential 
D)  graded potential 
E)  long-term potentiation 
A)  resting potential 
B)  nerve action potential 
C)  muscle action potential 
D)  graded potential 
E)  long-term potentiation

Question 7

Resting membrane potential is ___.

Accepted Answer

A)  55mV 
B)  -55mV 
C)  60mV 
D)  -70mV 
E)  70mV 
A)  55mV 
B)  -55mV 
C)  60mV 
D)  -70mV 
E)  70mV

Question 8

Using the diagram, which arrow is pointing to salutatory conduction?

Accepted Answer

A)  L 
B)  M 
C)  N 
D)  O 
A)  L 
B)  M 
C)  N 
D)  O

Question 9

In the diagram, where is the axon collateral?

Accepted Answer

A)  C 
B)  D 
C)  F 
D)  H 
E)  I 
A)  C 
B)  D 
C)  F 
D)  H 
E)  I

Question 10

In the diagram below, where is the synaptic bulb?

Accepted Answer

A)  A 
B)  B 
C)  I 
D)  D 
E)  Both A and D 
A)  A 
B)  B 
C)  I 
D)  D 
E)  Both A and D

Question 11

Which is not a type of channel used in production of an electrical signal in neurons?

Accepted Answer

A)  leakage channel 
B)  voltage-gated channel 
C)  ligand-gated channel 
D)  mechanically gated channel 
E)  ion dependent channel 
A)  leakage channel 
B)  voltage-gated channel 
C)  ligand-gated channel 
D)  mechanically gated channel 
E)  ion dependent channel

Question 12

Which axons have the largest diameter?

Accepted Answer

A)  A fibers 
B)  B fibers 
C)  C fibers 
D)  none of these choices 
A)  A fibers 
B)  B fibers 
C)  C fibers 
D)  none of these choices

Question 13

Describe the three conditions that allow maintenance of the resting membrane potential in excitable cells.

Accepted Answer

Unequal distribution of ions a

Question 14

In temporal summation, a single presynaptic neuron stimulates the creation of action potentials in a postsynaptic neuron when it

Accepted Answer

A)  stops firing long enough to allow the postsynaptic neuron to recover. 
B)  fires at a fast enough rate that the sum of EPSPs in the postsynaptic neuron moves above threshold. 
C)  fires at a steady rate that allows the postsynaptic neuron to return to resting potential. 
D)  recruits other presynaptic neurons to begin to fire. 
E)  runs out of neurotransmitter. 
A)  stops firing long enough to allow the postsynaptic neuron to recover. 
B)  fires at a fast enough rate that the sum of EPSPs in the postsynaptic neuron moves above threshold. 
C)  fires at a steady rate that allows the postsynaptic neuron to return to resting potential. 
D)  recruits other presynaptic neurons to begin to fire. 
E)  runs out of neurotransmitter.

Question 15

This contains neuronal cell bodies, dendrites, unmyelinated axons, axon terminals, and neruoglia.

Accepted Answer

A)  gray matter 
B)  white matter 
C)  astrocytes 
D)  satellite cells 
E)  ependymal cells 
A)  gray matter 
B)  white matter 
C)  astrocytes 
D)  satellite cells 
E)  ependymal cells

Question 16

Explain the phenomenon of an EPSP.

Accepted Answer

A neurotransmitter, which depo

Question 17

During this period, a second action potential can only be initiated by a larger than normal stimulus.

Accepted Answer

A)  latent period 
B)  absolute refractory period 
C)  relative refractory period 
D)  all of these choices 
E)  none of these choices 
A)  latent period 
B)  absolute refractory period 
C)  relative refractory period 
D)  all of these choices 
E)  none of these choices

Question 18

In the diagram, which figure demonstrates a voltage-gated channel?

Accepted Answer

A)  O 
B)  N 
C)  M 
D)  L 
A)  O 
B)  N 
C)  M 
D)  L

Question 19

This type of neuron has one main dendrite and one main axon.

Accepted Answer

A)  multipolar neuron 
B)  bipolar neuron 
C)  unipolar neuron 
D)  purkinje cell 
E)  renshaw cell 
A)  multipolar neuron 
B)  bipolar neuron 
C)  unipolar neuron 
D)  purkinje cell 
E)  renshaw cell

Question 20

Name the type of membrane channel that opens in response to touch, pressure, vibration, or tissue stretching and is found in the auditory receptors of the ear, and in touch and pressure receptors in the skin.

Accepted Answer

A)  leakage channel 
B)  ligand-gated channels 
C)  mechanically gated channels 
D)  voltage-gated channels 
E)  temperature-sensitive channel 
A)  leakage channel 
B)  ligand-gated channels 
C)  mechanically gated channels 
D)  voltage-gated channels 
E)  temperature-sensitive channel

Exam 12: Introduction to the Nervous System

Wallerian degeneration refers to

The peripheral nervous system can be divided into:

Which type of axons has the largest diameter?

Which of the following terms is used to describe a type of synapse?

Briefly describe what causes the depolarizing phase.

Which of the following types of electrical signals allow rapid long-distance communication within the nervous system?

Resting membrane potential is ___.

Using the diagram, which arrow is pointing to salutatory conduction?

In the diagram, where is the axon collateral?

In the diagram below, where is the synaptic bulb?

Which is not a type of channel used in production of an electrical signal in neurons?

Which axons have the largest diameter?

Describe the three conditions that allow maintenance of the resting membrane potential in excitable cells.

In temporal summation, a single presynaptic neuron stimulates the creation of action potentials in a postsynaptic neuron when it

This contains neuronal cell bodies, dendrites, unmyelinated axons, axon terminals, and neruoglia.

Explain the phenomenon of an EPSP.

During this period, a second action potential can only be initiated by a larger than normal stimulus.

In the diagram, which figure demonstrates a voltage-gated channel?

This type of neuron has one main dendrite and one main axon.

Name the type of membrane channel that opens in response to touch, pressure, vibration, or tissue stretching and is found in the auditory receptors of the ear, and in touch and pressure receptors in the skin.

An Introduction to the Human Body

The Chemical Level of Organization

The Cellular Level of Organization

The Tissue Level of Organization

The Integumentary System

Introduction to the Skeletal System

The Axial Skeleton

The Appendicular Skeleton

Articulations

Muscle Tissue

The Muscular System

The Central Nervous System

The Peripheral Nervous System

Sensory, Motor, and Integrative Systems

The Special Senses

The Endocrine System

The Cardiovascular System: the Blood

The Cardiovascular System: the Heart

The Cardiovascular System: Blood Vessels

The Lymphatic System and Immunity

The Respiratory System

The Digestive System

The Urinary System

The Reproductive Systems and Development

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