Question 16 / 19:  What is the difference between the optic nerve and tract?
A.  One has oligodendrocytes and the other Schwann cells.
B.  One has third order axons and one has second order axons.
C.  One has only ipsilateral axons and the other has both ipsilateral and contralateral axons.
D.  One is central nervous system tissue and the other is peripheral nervous system tissue.
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Explanation:

Because of the partial decussation in the chiasm, the optic tract contains axons from ganglion cells of both eyes.

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Neuroanatomy 07 The Visual System

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Attribution:  Stephen C. Voron, M.D., Suzanne S. Stensaas, Ph.D. , Department of Neurobiology and Anatomy, University of Utah, School of Medicine, Salt Lake City, Utah 84132, http://library.med.utah.edu/kw/hyperbrain
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