Which Statement Does Not Describe a Reason That Tract-Tracing Studies

question 5

Multiple Choice

Which statement does not describe a reason that tract-tracing studies have been difficult to perform?

• A) Fibers with different destinations often travel together.
• B) Axons have very small diameters and therefore are hard to see.
• C) Axons from different sources look alike.
• D) All of the above are reasons for the difficulty.

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