Descending Tracts

question 41

Multiple Choice

Descending tracts

• A) include the corticospinal tract.
• B) contain axons of upper motor neurons that cross over to the other side of the spinal cord.
• C) include the extrapyramidal tracts, which are involved in unconscious control of motor function.
• D) contain upper motor neurons that modulate the activity of lower motor neurons.
• E) have all of these properties.

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Definitions:

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Stem cells that can differentiate into various types of cells including those of the bone, cartilage, muscle, and fat tissue.

Mutation

A mutation is a change in the DNA sequence within an organism's gene or chromosome, leading to variation.