Multiple sclerosis (MS) is a disease in which the myelin sheaths are destroyed. What process does this interfere with and what would be the consequence?
What will be an ideal response
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Question 2) Like all cells, the neurons' internal organization dictates its function. Neurons have relatively many mitochondria, an extensive network of rough endoplasmic reticulum and many clusters of ribosomes.
These cellular features indicate all of the following EXCEPT ________.
A) neurons produce many proteins
B) neurons must meet a high demand for ATP
C) neurons have a relatively high consumption of oxygen
D) neurons have stable, relatively unchanging internal environments
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Question 3) Which of the following muscles is involved in crossing one leg over the other to produce the cross-legged position?
A) all of the hamstrings
B) the quadriceps femoris
C) the sartorius
D) the gastrocnemius
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Question 4) Meningitis can be caused by infection of the central nervous system by bacteria. Which cells would be most responsible for removing the infection?
A) Schwann cells
B) oligodendrocytes
C) microglia
D) satellite cells
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Question 5) Because all action potentials are alike, how does the brain separate situations that require immediate attention from ordinary positional reports?
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Question 6) Which group of muscles elevates the first two ribs and flexes and rotates the neck?
A) the spinalis
B) the iliocostalis
C) the scalenes
D) the splenius
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Question 7) Schwann cells are functionally similar to ________.
A) astrocytes
B) microglia
C) ependymal cells
D) oligodendrocytes
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Question 8) Bacteria in the blood can be prevented entry to the fluids surrounding the brain. Which cells are most responsible for preventing bacteria from entering the fluids of the brain?
A) satellite cells
B) astrocytes
C) Schwann cells
D) oligodendrocytes
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Question 9) What are the basic divisions of the peripheral nervous system?
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Question 10) Which of the following correctly describes a graded potential?
A) it has a depolarization, repolarization and hyperpolarization phase
B) it can have amplitudes of various sizes
C) it is initiated by voltage changes in the membrane
D) it travels long distances
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