Question

which is a descending tract in the spinal cord? multiple choice spinocerebellar tract spinothalamic tract fasciculus gracilis rubrospinal tract

Explanation:

1. Recall tract types: Ascending tracts carry sensory info to the brain; descending carry motor info from brain to spinal cord.
2. Analyze options: Spinocerebellar, Spinothalamic, Fasciculus gracilis are ascending (sensory). Rubrospinal is descending (motor), so it's the correct choice.

Answer:

D. Rubrospinal tract (assuming the last option is Rubrospinal tract; let's correct the analysis: Descending tracts carry motor signals from the brain down the spinal cord. The Rubrospinal tract is a descending tract involved in motor control. The other options: Spinocerebellar (sensory, ascending), Spinothalamic (sensory, ascending), Fasciculus gracilis (sensory, ascending) are ascending tracts. So the correct descending tract is the Rubrospinal tract (the last option, likely labeled as D or the last circle's option).)