Question 1

This is comprised of flattened cells that encircle the axon.

Accepted Answer

A)  A 
B)  B 
C)  C 
D)  D 
E)  E 
A)  A 
B)  B 
C)  C 
D)  D 
E)  E

Question 2

In the CNS, this is produced by oligodendrocytes.

Accepted Answer

A)  A 
B)  B 
C)  C 
D)  D 
E)  E 
A)  A 
B)  B 
C)  C 
D)  D 
E)  E

Question 3

Depolarizing graded potentials originate in the dendrites or cell body of a neuron and then travel to the ___.

Accepted Answer

A)  axon 
B)  Schwann cell 
C)  motor-end plate 
D)  trigger zone 
E)  end plate 
A)  axon 
B)  Schwann cell 
C)  motor-end plate 
D)  trigger zone 
E)  end plate

Question 4

In an action potential, the current that flows down the axon of a neuron is generated by the movement of ___ across the membrane.

Accepted Answer

A)  electrons 
B)  protons 
C)  ions 
D)  free radicals 
E)  neutrons 
A)  electrons 
B)  protons 
C)  ions 
D)  free radicals 
E)  neutrons

Question 5

Hearing your cell phone ring in an otherwise quiet lecture hall is an example of which of the following types of nervous system functions?

Accepted Answer

A)  sensory function 
B)  integrative function 
C)  motor function 
D)  more than one of the types of nervous system functions 
E)  none of the types of nervous system functions 
A)  sensory function 
B)  integrative function 
C)  motor function 
D)  more than one of the types of nervous system functions 
E)  none of the types of nervous system functions

Question 6

IPSP stands for

Accepted Answer

A)  inhibitory presynaptic summation potential. 
B)  inhibitory postsynaptic summation potential. 
C)  inhibitory postsynaptic potential. 
D)  inhibitory presynaptic potential. 
E)  none of these choices. 
A)  inhibitory presynaptic summation potential. 
B)  inhibitory postsynaptic summation potential. 
C)  inhibitory postsynaptic potential. 
D)  inhibitory presynaptic potential. 
E)  none of these choices.

Question 7

A postsynaptic neuron may respond to inhibitory and excitatory effects in which of the following ways:

Accepted Answer

A)  EPSP 
B)  nerve impulse 
C)  IPSP 
D)  both EPSP and IPSP 
E)  all of these choices 
A)  EPSP 
B)  nerve impulse 
C)  IPSP 
D)  both EPSP and IPSP 
E)  all of these choices

Question 8

Explain an axosomatic synapse.

Accepted Answer

This is an action po

Question 9

When a depolarizing graded potential makes the membrane depolarize to threshold

Accepted Answer

A)  ligand gated Ca+ channels close rapidly. 
B)  voltage gated CA+ channels open rapidly. 
C)  ligand gated Na+ channels close rapidly. 
D)  voltage gated Na+ channels open rapidly. 
E)  none of these choices. 
A)  ligand gated Ca+ channels close rapidly. 
B)  voltage gated CA+ channels open rapidly. 
C)  ligand gated Na+ channels close rapidly. 
D)  voltage gated Na+ channels open rapidly. 
E)  none of these choices.

Question 10

Using the diagram, identify the sensory neuron.

Accepted Answer

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

Question 11

What phenomenon explains why a light touch feels different than a touch applied with more pressure?

Accepted Answer

A)  saltatory conduction 
B)  continuous conduction 
C)  frequency of impulses 
D)  propagation 
E)  refractory period 
A)  saltatory conduction 
B)  continuous conduction 
C)  frequency of impulses 
D)  propagation 
E)  refractory period

Question 12

Name the type of membrane channel that randomly opens and closes and is found in dendrites, cell bodies, and axons of all types of neurons.

Accepted Answer

A)  leak channel 
B)  ligand-gated channel 
C)  mechanically gated channel 
D)  voltage-gated channel 
E)  pressure-sensitive channel 
A)  leak channel 
B)  ligand-gated channel 
C)  mechanically gated channel 
D)  voltage-gated channel 
E)  pressure-sensitive channel

Question 13

Which part of the diagram contains organelles and Nissl bodies?

Accepted Answer

A)  A 
B)  B 
C)  C 
D)  E 
E)  Both a and b 
A)  A 
B)  B 
C)  C 
D)  E 
E)  Both a and b

Question 14

Which letter indicates the Na+ leak channel?

Accepted Answer

A)  A 
B)  B 
C)  C 
D)  D 
E)  E 
A)  A 
B)  B 
C)  C 
D)  D 
E)  E

Question 15

The motor portion of the autonomic nervous system can be divided into:

Accepted Answer

A)  sympathetic division 
B)  parasympathetic division 
C)  enteric division 
D)  sympathetic division and parasympathetic division 
E)  all of these choices 
A)  sympathetic division 
B)  parasympathetic division 
C)  enteric division 
D)  sympathetic division and parasympathetic division 
E)  all of these choices

Question 16

An excitatory neurotransmitter ___ the postsynaptic membrane.

Accepted Answer

A)  depolarizes 
B)  repolarizes 
C)  hyperpolarizes 
D)  does not affect the polarity of 
E)  moves across channels in 
A)  depolarizes 
B)  repolarizes 
C)  hyperpolarizes 
D)  does not affect the polarity of 
E)  moves across channels in

Question 17

Using the diagram, identify the lower motor neuron.

Accepted Answer

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

Question 18

Which letter indicates neurons?

Accepted Answer

A)  A 
B)  B 
C)  C 
D)  D 
E)  E 
A)  A 
B)  B 
C)  C 
D)  D 
E)  E

Question 19

This type of neural circuit consists of a single presynaptic neuron synapsing with several postsynaptic neurons.

Accepted Answer

A)  diverging circuit 
B)  converging circuit 
C)  reverberating circuit 
D)  parallel after-discharge circuit 
E)  normal circuit 
A)  diverging circuit 
B)  converging circuit 
C)  reverberating circuit 
D)  parallel after-discharge circuit 
E)  normal circuit

Question 20

This electrically insulates the axon of a neuron to increase the speed of nerve impulse conduction.

Accepted Answer

A)  A 
B)  B 
C)  C 
D)  D 
E)  E 
A)  A 
B)  B 
C)  C 
D)  D 
E)  E

Exam 12: Introduction to the Nervous System

This is comprised of flattened cells that encircle the axon.

In the CNS, this is produced by oligodendrocytes.

Depolarizing graded potentials originate in the dendrites or cell body of a neuron and then travel to the ___.

In an action potential, the current that flows down the axon of a neuron is generated by the movement of ___ across the membrane.

Hearing your cell phone ring in an otherwise quiet lecture hall is an example of which of the following types of nervous system functions?

IPSP stands for

A postsynaptic neuron may respond to inhibitory and excitatory effects in which of the following ways:

Explain an axosomatic synapse.

When a depolarizing graded potential makes the membrane depolarize to threshold

Using the diagram, identify the sensory neuron.

What phenomenon explains why a light touch feels different than a touch applied with more pressure?

Name the type of membrane channel that randomly opens and closes and is found in dendrites, cell bodies, and axons of all types of neurons.

Which part of the diagram contains organelles and Nissl bodies?

Which letter indicates the Na+ leak channel?

The motor portion of the autonomic nervous system can be divided into:

An excitatory neurotransmitter ___ the postsynaptic membrane.

Using the diagram, identify the lower motor neuron.

Which letter indicates neurons?

This type of neural circuit consists of a single presynaptic neuron synapsing with several postsynaptic neurons.

This electrically insulates the axon of a neuron to increase the speed of nerve impulse conduction.

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

Filters

Which letter indicates the Na⁺ leak channel?