Question 1

Describe the myelin sheath.

Accepted Answer

Schwann cells in the PNS and oligodendro

Question 2

Which of the following statements concerning sensory neurons is incorrect?

Accepted Answer

A)  Most are pseudounipolar. 
B)  Most have their cell bodies in ganglia outside the CNS. 
C)  They have peripheral and central processes. 
D)  They contain only dendrites. 
A)  Most are pseudounipolar. 
B)  Most have their cell bodies in ganglia outside the CNS. 
C)  They have peripheral and central processes. 
D)  They contain only dendrites.

Question 3

Use the diagrams above to answer the following questions.
-Identify which letter represents an oligodendrocyte.

Accepted Answer

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

Question 4

Oligodendrocytes and Schwann cells myelinate neurons within the peripheral nervous system.

Accepted Answer

A) True 
 B)False

Question 5

All of the neuron's organelles are localized to the cell body.

Accepted Answer

A) True 
 B)False

Question 6

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 7

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

Accepted Answer

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

Question 8

Most synapses transmit communicating signals using

Accepted Answer

A)  chemical signaling molecules-neurotransmitters. 
B)  electrical impulses travelling through gap junctions. 
C)  physical contact between adjacent neurons. 
D)  chemical signaling molecules released from neuroglia. 
A)  chemical signaling molecules-neurotransmitters. 
B)  electrical impulses travelling through gap junctions. 
C)  physical contact between adjacent neurons. 
D)  chemical signaling molecules released from neuroglia.

Question 9

Which of the following statements about neurotransmitters is false?

Accepted Answer

A)  They alter the charge of the postsynaptic neuron membrane. 
B)  They are waves of positive charges that travel down axons. 
C)  They are released from synaptic vesicles. 
D)  They diffuse across the synaptic cleft. 
A)  They alter the charge of the postsynaptic neuron membrane. 
B)  They are waves of positive charges that travel down axons. 
C)  They are released from synaptic vesicles. 
D)  They diffuse across the synaptic cleft.

Question 10

Gray matter in the CNS contains all of the following except

Accepted Answer

A)  neuron cell bodies. 
B)  neuroglia. 
C)  dendrites. 
D)  fiber tracts. 
A)  neuron cell bodies. 
B)  neuroglia. 
C)  dendrites. 
D)  fiber tracts.

Question 11

Any long axon is called a nerve fiber.

Accepted Answer

A) True 
 B)False

Question 12

This neuronal region transmits electrical impulses away from the cell body.

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 13

This region of a neuron is characterized by numerous, short cytoplasmic extensions and is often referred to as receiving regions.

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 14

Chromatophilic bodies are clusters of rough ER and free ribosomes that produce the large amount of proteins needed by a neuron.

Accepted Answer

A) True 
 B)False

Question 15

Less than 15% of all neurons are interneurons.

Accepted Answer

A) True 
 B)False

Question 16

This part of the neuron may have branching collaterals.

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 17

________ are chemicals that control the growth of newly forming neurons.

Accepted Answer

The answer of ________ are chemicals that control the growth...

Question 18

Regeneration of peripheral axons requires

Accepted Answer

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

Question 19

Neurotransmitters are found packaged inside ________ in the axon terminal.

Accepted Answer

The answer of Neurotransmitters are found packaged inside ________ in...

Question 20

The majority of neurons in the body are

Accepted Answer

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

Exam 12: Fundamentals of the Nervous System and Nervous Tissue

Describe the myelin sheath.

Which of the following statements concerning sensory neurons is incorrect?

Use the diagrams above to answer the following questions. -Identify which letter represents an oligodendrocyte.

Oligodendrocytes and Schwann cells myelinate neurons within the peripheral nervous system.

All of the neuron's organelles are localized to the cell body.

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

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

Most synapses transmit communicating signals using

Which of the following statements about neurotransmitters is false?

Gray matter in the CNS contains all of the following except

Any long axon is called a nerve fiber.

This neuronal region transmits electrical impulses away from the cell body.

This region of a neuron is characterized by numerous, short cytoplasmic extensions and is often referred to as receiving regions.

Chromatophilic bodies are clusters of rough ER and free ribosomes that produce the large amount of proteins needed by a neuron.

Less than 15% of all neurons are interneurons.

This part of the neuron may have branching collaterals.

________ are chemicals that control the growth of newly forming neurons.

Regeneration of peripheral axons requires

Neurotransmitters are found packaged inside ________ in the axon terminal.

The majority of neurons in the body are

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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