The cytoskeleton and cell motility

Because cytoplasmic vesicles are seen to move in both directions within an axon, can you conclude that some microtubules are oriented with their plus end facing the axon terminus and others oriented with the opposite polarity?

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...called kinesin and dynein with some accesory factors. These proteins act as a sort of "mule" or "bucket brigade" where one end of the protein is attached to the microtubule and the other is attached to a vesicle. It has not been established exactly how these proteins move along the tubule. Evidence suggests that each protein essentially "walks" along the tubule while others note that there are several proteins that "pass the bucket" or vesicle toward one way or another. If I had to choose I would pick the walking theory because it can ...