Question 1

Which of the following statements about an axon is false?

Accepted Answer

A)  It has branches. 
B)  It has a uniform diameter. 
C)  It carries nerve impulses toward the cell body. 
D)  It is also referred to as a nerve fiber. 
A)  It has branches. 
B)  It has a uniform diameter. 
C)  It carries nerve impulses toward the cell body. 
D)  It is also referred to as a nerve fiber.

Question 2

Action potentials travel along the

Accepted Answer

A)  dendrite membrane. 
B)  axon membrane. 
C)  cell body. 
D)  myelin. 
A)  dendrite membrane. 
B)  axon membrane. 
C)  cell body. 
D)  myelin.

Question 3

Vesicles containing neurotransmitters are located in

Accepted Answer

A)  the nodes of Ranvier. 
B)  axon terminals. 
C)  a synaptic cleft. 
D)  the postsynaptic region of dendrites. 
A)  the nodes of Ranvier. 
B)  axon terminals. 
C)  a synaptic cleft. 
D)  the postsynaptic region of dendrites.

Question 4

Figure 12.1
Use the diagram pictured above to answer the following questions.
-Identify the letter that indicates the region of a neuron where neurotransmitters are released.

Accepted Answer

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

Question 5

The majority of neurons in the body are

Accepted Answer

A)  unipolar. 
B)  pseudounipolar. 
C)  bipolar. 
D)  multipolar. 
A)  unipolar. 
B)  pseudounipolar. 
C)  bipolar. 
D)  multipolar.

Question 6

Any long axon is called a nerve fiber.

Accepted Answer

A) True 
 B)False

Question 7

Ganglia represent

Accepted Answer

A)  groups of dendrites. 
B)  groups of neuron cell bodies. 
C)  groups of synapses. 
D)  groups of axons. 
A)  groups of dendrites. 
B)  groups of neuron cell bodies. 
C)  groups of synapses. 
D)  groups of axons.

Question 8

Which relatively rare type of neuron has two processes extending from opposite sides of the cell body?

Accepted Answer

A)  multipolar 
B)  pseudounipolar 
C)  bipolar 
D)  unipolar 
A)  multipolar 
B)  pseudounipolar 
C)  bipolar 
D)  unipolar

Question 9

Regeneration of peripheral axons requires

Accepted Answer

A)  formation of a tube by Schwann cells to guide growth. 
B)  deposition of neurofilaments to bridge the gap between the original axon fragments. 
C)  construction of a collateral that branches from the point of damage. 
D)  migration of neural stem cells from the hippocampus. 
A)  formation of a tube by Schwann cells to guide growth. 
B)  deposition of neurofilaments to bridge the gap between the original axon fragments. 
C)  construction of a collateral that branches from the point of damage. 
D)  migration of neural stem cells from the hippocampus.

Question 10

Neurofibrils

Accepted Answer

A)  help circulate cerebrospinal fluid. 
B)  receive incoming stimuli and pass the signal toward the cell body. 
C)  prevent the neuron from being pulled apart when subjected to tensile forces. 
D)  form synapses with axons of postsynaptic neurons. 
A)  help circulate cerebrospinal fluid. 
B)  receive incoming stimuli and pass the signal toward the cell body. 
C)  prevent the neuron from being pulled apart when subjected to tensile forces. 
D)  form synapses with axons of postsynaptic neurons.

Question 11

Name four characteristics that distinguish neuroglial cells from neurons.

Accepted Answer

Glial cells are smaller, they

Question 12

The entire nerve is surrounded by a tough fibrous sheath called the

Accepted Answer

A)  ectoneurium. 
B)  epineurium. 
C)  perineurium. 
D)  endoneurium. 
A)  ectoneurium. 
B)  epineurium. 
C)  perineurium. 
D)  endoneurium.

Question 13

The somatic motor subdivision of the peripheral nervous system is considered to be an involuntary nervous system.

Accepted Answer

A) True 
 B)False

Question 14

Figure 12.1
Use the diagram pictured above to answer the following questions.
-Identify the letter that indicates the gaps between Schwann cells that are known as myelin sheath gaps (nodes of Ranvier).

Accepted Answer

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

Question 15

Sensory neurons arise primarily from the

Accepted Answer

A)  neural tube. 
B)  alar plate. 
C)  basal plate. 
D)  neural crest. 
A)  neural tube. 
B)  alar plate. 
C)  basal plate. 
D)  neural crest.

Question 16

These glial cells surround the cell bodies of sensory neurons within ganglia of the PNS.

Accepted Answer

A)  Schwann cells 
B)  satellite cells 
C)  astrocytes 
D)  microglia 
A)  Schwann cells 
B)  satellite cells 
C)  astrocytes 
D)  microglia

Question 17

Which cells provide the myelin sheath for neurons in the PNS?

Accepted Answer

A)  microglial cells 
B)  oligodendrocytes 
C)  astrocytes 
D)  Schwann cells 
A)  microglial cells 
B)  oligodendrocytes 
C)  astrocytes 
D)  Schwann cells

Question 18

This region of a neuron contains chromatophilic substance or Nissl bodies.

Accepted Answer

A)  synapse 
B)  axon terminal 
C)  axon 
D)  cell body 
E)  dendrite 
A)  synapse 
B)  axon terminal 
C)  axon 
D)  cell body 
E)  dendrite

Question 19

Describe the levels of layers of myelin and connective tissue surrounding a nerve.

Accepted Answer

The axon is myelinated by Schwann cells,

Question 20

A monosynaptic reflex arc is an example of

Accepted Answer

A)  serial processing. 
B)  a converging circuit. 
C)  parallel processing. 
D)  a reverberating circuit. 
A)  serial processing. 
B)  a converging circuit. 
C)  parallel processing. 
D)  a reverberating circuit.

Exam 12: Fundamentals of the Nervous System and Nervous Tissue

Which of the following statements about an axon is false?

Action potentials travel along the

Vesicles containing neurotransmitters are located in

Figure 12.1 Use the diagram pictured above to answer the following questions. -Identify the letter that indicates the region of a neuron where neurotransmitters are released.

The majority of neurons in the body are

Any long axon is called a nerve fiber.

Ganglia represent

Which relatively rare type of neuron has two processes extending from opposite sides of the cell body?

Regeneration of peripheral axons requires

Neurofibrils

Name four characteristics that distinguish neuroglial cells from neurons.

The entire nerve is surrounded by a tough fibrous sheath called the

The somatic motor subdivision of the peripheral nervous system is considered to be an involuntary nervous system.

Figure 12.1 Use the diagram pictured above to answer the following questions. -Identify the letter that indicates the gaps between Schwann cells that are known as myelin sheath gaps (nodes of Ranvier).

Sensory neurons arise primarily from the

These glial cells surround the cell bodies of sensory neurons within ganglia of the PNS.

Which cells provide the myelin sheath for neurons in the PNS?

This region of a neuron contains chromatophilic substance or Nissl bodies.

Describe the levels of layers of myelin and connective tissue surrounding a nerve.

A monosynaptic reflex arc is an example of

The Human Body: an Orientation

Cells: the Living Units

Basic Embryology

Tissues

The Integumentary System

Bones and Skeletal Tissues

Bones, Part 1: the Axial Skeleton

Bones, Part 2: the Appendicular Skeleton

Joints

Skeletal Muscle Tissue

Muscles of the Body

The Central Nervous System

The Peripheral Nervous System

The Autonomic Nervous System and Visceral Sensory Neurons

The Special Senses

The Endocrine System

Blood

The Heart

Blood Vessels

The Lymphatic and Immune Systems

The Respiratory System

The Digestive System

The Urinary System

The Reproductive System

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