Following damage to the axon of a cell, all of the following occur in the PNS. However, in the CNS, the last step is usually:
A. degeneration of the distal axon
B. chromatolysis in the cell body
C. sprouting of new branches
D. axon regrowth along the original pathway
E. reinnervation of the target
ANS: C
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What is the meaning of autoimmunity??
A) ?A mother passes her antibodies to her unborn child. B) ?An individual is naturally immune to many common diseases. C) ?Immunity has been acquired through vaccines. D) ?The immune system mistakenly targets normal body cells.
The efferent division of the peripheral nervous system innervates ________ cells
A) skeletal muscle B) smooth muscle C) heart muscle D) glandular E) All of the answers are correct.
The ____________________ lung is shorter.
Fill in the blank(s) with the appropriate word(s).
In which autoimmune disease do antibodies attack the myelin sheath?
A. Rheumatoid arthritis B. Systemic lupus erythematosus C. Myasthenia gravis D. Multiple sclerosis