Question 1

These glial cells play a role in capillary-neuron exchanges and control the chemical environment around neurons.

Accepted Answer

A)   Schwann cells
B)   ependymal cells
C)   microglia
D)   astrocytesE) C) and D)
F) A) and B)

Question 2

Chromatophilic substance, found within the cell bodies of neurons, is involved in the metabolic activities of the cell and is composed of _.

Accepted Answer

A)   mitochondria
B)   cytoskeletal elements
C)   rough endoplasmic reticulum
D)   lysosomesE) All of the above
F) A) and B)

Question 3

Groups of axons within a nerve are bound into fascicles by a coarse connective tissue called .

Accepted Answer

A)   perineurium
B)   epineurium
C)   endoneuriumD) None of the above
E) A) and C) A

Question 4

These neurons transmit impulses from CNS to effectors.

Accepted Answer

A)   interneurons
B)   sensory neurons
C)   motor neuronsD) B) and C)
E) All of the above

Question 5

These glial cell line cerebrospinal fluid-filled cavities in the CNS.

Accepted Answer

A)   ependymal cells
B)   Schwann cells
C)   microglia
D)   astrocytesE) A) and D)
F) A) and C)

Question 6

Cell bodies of these neurons lie in ganglia in the peripheral nervous system (PNS) .

Accepted Answer

A)   interneurons
B)   motor neurons
C)   sensory neuronsD) B) and C)
E) All of the above

Question 7

A nerve ________.

Accepted Answer

A)   consists of axons wrapped in connective tissue in the PNS
B)   is found only in the CNS
C)   consists of entire neurons - dendrites, cell bodies, and axonsD) B) and C)
E) A) and B)

Question 8

Myelin is important in .

Accepted Answer

A)   allowing electrical signals to be transferred from one axon to another adjacent axon
B)   maintaining the ionic balance in the environment surrounding the axon
C)   insulating axons and increasing the conduction velocity of action potentials
D)   absorbing damaged tissue or invading organismsE) A) and D)
F) B) and C)

Question 9

What is true of a mixed nerve?

Accepted Answer

A)   It contains only efferent axons.
B)   It contains both afferent and efferent axons.
C)   It is found only in the central nervous system.
D)   It contains only afferent axons.E) B) and C)
F) All of the above

Question 10

Sensory or afferent neurons are typically of this type.

Accepted Answer

A)   multipolar
B)   bipolar
C)   unipolarD) B) and C)
E) A) and C)

Question 11

The outermost connective tissue covering of a nerve is called the .

Accepted Answer

A)   perineurium
B)   epineurium
C)   endoneuriumD) A) and B)
E) A) and C)

Question 12

Oligodendrocytes form myelin around .

Accepted Answer

A)   Oligodendrocytes do not make myelin.
B)   only one axon in the peripheral nervous system
C)   several axons in the central nervous system
D)   dozens of axons in both the central and peripheral nervous systemsE) C) and D)
F) A) and B)

Question 13

You have lost the sensation, but not movement, in one of your hands due to a problem with your spinal cord neurons. Based upon these symptoms, what type of neuron was most likely affected?

Accepted Answer

A)   motor neuron
B)   afferent neuron
C)   motor and sensory neurons
D)   efferent neuronE) All of the above
F) None of the above B

Question 14

This part of the neuron generates and conducts action potentials.

Accepted Answer

A)   cell body
B)   dendrite
C)   axonD) A) and B)
E) A) and C)

Question 15

The formation of myelin in the peripheral nervous system is accomplished by these cells.

Accepted Answer

A)   Schwann cells
B)   astrocytes
C)   oligodendrocytes
D)   satellite cellsE) A) and B)
F) C) and D)

Question 16

The gaps in the sheath that insulates axons are called .

Accepted Answer

A)   outer collar of perinuclear cytoplasm
B)   myelinated fibers
C)   myelin sheath gaps
D)   gaps of SchwannE) A) and C)
F) None of the above

Question 17

Interneurons (association neurons)  in the brain are likely to be neurons.

Accepted Answer

A)   multipolar
B)   unipolar
C)   bipolarD) B) and C)
E) A) and C)

Question 18

At an axon terminal, the electrical signal from one cell .

Accepted Answer

A)   jumps from the axon terminal to the next cell
B)   causes the release of chemical neurotransmitter molecules that cause an electrical signal in the next cell
C)   is transmitted directly to the next cell by strands of membrane
D)   ends and the signal it carried is not transmitted to another cellE) None of the above
F) A) and C)

Question 19

The forms synapses, or junctions, with other neurons or effector cells.

Accepted Answer

A)   synaptic cleft
B)   axon hillock
C)   axon terminal
D)   initial segmentE) B) and C)
F) A) and D) C

Question 20

You are examining a neuron under the microscope. It appears as a round cell without visible processes. What is true of this neuron?

Accepted Answer

A)   It is most likely a sensory neuron.
B)   It is likely to be a unipolar neuron.
C)   It is located in the PNS (peripheral nervous system) .
D)   It is likely to be a unipolar neuron, it is located in the PNS (peripheral nervous system) , and it is most likely to be a sensory neuron.E) A) and B)
F) None of the above

Exam 15: Histology of Nervous Tissue

These glial cells play a role in capillary-neuron exchanges and control the chemical environment around neurons.

Correct AnswerverifiedShow Answer

Chromatophilic substance, found within the cell bodies of neurons, is involved in the metabolic activities of the cell and is composed of _.

Correct AnswerverifiedShow Answer

Groups of axons within a nerve are bound into fascicles by a coarse connective tissue called .

Correct AnswerverifiedA

These neurons transmit impulses from CNS to effectors.

Correct AnswerverifiedShow Answer

These glial cell line cerebrospinal fluid-filled cavities in the CNS.

Correct AnswerverifiedShow Answer

Cell bodies of these neurons lie in ganglia in the peripheral nervous system (PNS) .

Correct AnswerverifiedShow Answer

A nerve ________.

Correct AnswerverifiedShow Answer

Myelin is important in .

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What is true of a mixed nerve?

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Sensory or afferent neurons are typically of this type.

Correct AnswerverifiedShow Answer

The outermost connective tissue covering of a nerve is called the .

Correct AnswerverifiedShow Answer

Oligodendrocytes form myelin around .

Correct AnswerverifiedShow Answer

You have lost the sensation, but not movement, in one of your hands due to a problem with your spinal cord neurons. Based upon these symptoms, what type of neuron was most likely affected?

Correct AnswerverifiedB

This part of the neuron generates and conducts action potentials.

Correct AnswerverifiedShow Answer

The formation of myelin in the peripheral nervous system is accomplished by these cells.

Correct AnswerverifiedShow Answer

The gaps in the sheath that insulates axons are called .

Correct AnswerverifiedShow Answer

Interneurons (association neurons) in the brain are likely to be neurons.

Correct AnswerverifiedShow Answer

At an axon terminal, the electrical signal from one cell .

Correct AnswerverifiedShow Answer

The forms synapses, or junctions, with other neurons or effector cells.

Correct AnswerverifiedC

You are examining a neuron under the microscope. It appears as a round cell without visible processes. What is true of this neuron?

Correct AnswerverifiedShow Answer

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A

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B

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C

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