Question 1

Astrocytes perform all of the following functions except

Accepted Answer

A)   regulating levels of neurotransmitters around the neurons
B)   controlling ion levels in the environment around neurons
C)   help with synapse formation in the developing nervous system
D)   produce cerebrospinal fluid

Question 2

________ form the myelin sheaths in the brain and spinal cord.

Accepted Answer

The answer of ________ form the myelin sheaths in the...

Question 3

The simplest of all reflexes, involving just two neurons, is the ________ reflex.

Accepted Answer

The answer of The simplest of all reflexes, involving just...

Question 4

A neuron is a collection of nerve fibers in the PNS.

Accepted Answer

A) True 
 B)False

Question 5

Use the diagrams above to answer the following questions.
-Identify which letter represents the most abundant category of glial cells in the CNS.

Accepted Answer

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

Question 6

The ________ matter of the spinal cord forms a butterfly-shaped structure.

Accepted Answer

The answer of The ________ matter of the spinal cord...

Question 7

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

Accepted Answer

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

Question 8

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

Accepted Answer

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

Question 9

Use the diagram pictured above to answer the following questions.
-Identify the letter that indicates the region of a neuron from which the axon leaves the cell body.

Accepted Answer

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

Question 10

Which of the following statements about an axon is false?

Accepted Answer

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

Question 11

Microglia are ciliated to help circulate cerebrospinal fluid (CSF).

Accepted Answer

A) True 
 B)False

Question 12

Which of the following is not a characteristic of neurons?

Accepted Answer

A)   longevity
B)   inability to divide
C)   high metabolic rate
D)   ability to survive without oxygen

Question 13

A nerve cell is the same as a

Accepted Answer

A)   nerve.
B)   nerve fiber.
C)   neurilemmocyte.
D)   neuron.

Question 14

The covering of a fascicle within a nerve is the

Accepted Answer

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

Question 15

Which of the following most immediately encases the smallest component of a nerve?

Accepted Answer

A)   endoneurium
B)   epineurium
C)   fascicle
D)   perineurium

Question 16

Nearly all somatic sensory neurons are of this type, based on the classification of the type and number of processes.

Accepted Answer

The answer of Nearly all somatic sensory neurons are of...

Question 17

Sensory neurons arise primarily from the

Accepted Answer

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

Question 18

________ components of the PNS regulate contraction of smooth and cardiac muscle.

Accepted Answer

The answer of ________ components of the PNS regulate contraction...

Question 19

These glial cells arise from embryonic white blood cells.

Accepted Answer

A)   ependymal cells
B)   microglia
C)   oligodendrocytes
D)   satellite cells

Question 20

Myelin on axons functions to

Accepted Answer

A)   make the axons live longer.
B)   store nutrients (fat)  for use by the neurons.
C)   cover nodes of Ranvier.
D)   speed the rate of impulse conduction and insulate neighboring axons from one another.

Exam 12: Fundamentals of the Nervous System and Nervous Tissue

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

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A nerve cell is the same as a

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

Correct AnswerverifiedShow Answer

A neuron is a collection of nerve fibers in the PNS.

Correct AnswerverifiedShow Answer

Which of the following most immediately encases the smallest component of a nerve?

Correct AnswerverifiedShow Answer

The simplest of all reflexes, involving just two neurons, is the ________ reflex.

Correct AnswerverifiedShow Answer

Which of the following is not a characteristic of neurons?

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Use the diagram pictured above to answer the following questions. -Identify the letter that indicates the region of a neuron from which the axon leaves the cell body.

Correct AnswerverifiedShow Answer

Microglia are ciliated to help circulate cerebrospinal fluid (CSF).

Correct AnswerverifiedShow Answer

________ components of the PNS regulate contraction of smooth and cardiac muscle.

Correct AnswerverifiedShow Answer

Use the diagrams above to answer the following questions. -Identify which letter represents the most abundant category of glial cells in the CNS.

Correct AnswerverifiedShow Answer

Astrocytes perform all of the following functions except

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These glial cells arise from embryonic white blood cells.

Correct AnswerverifiedShow Answer

Nearly all somatic sensory neurons are of this type, based on the classification of the type and number of processes.

Correct AnswerverifiedShow Answer

The ________ matter of the spinal cord forms a butterfly-shaped structure.

Correct AnswerverifiedShow Answer

Sensory neurons arise primarily from the

Correct AnswerverifiedShow Answer

Myelin on axons functions to

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The covering of a fascicle within a nerve is the

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________ form the myelin sheaths in the brain and spinal cord.

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Which of the following statements about an axon is false?

Correct AnswerverifiedShow Answer

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