Question

multiple choice question
action signals leave the spinal cord through the ____ roots. sensory signals enter the spinal cord through the ____ roots.

• anterior; anterior
• posterior; anterior
• posterior; posterior
• anterior; posterior

Explanation:

In the nervous system, motor (efferent) signals that cause actions leave the spinal cord via the anterior (ventral) roots. Sensory (afferent) signals that carry information from the body to the spinal cord enter through the posterior (dorsal) roots. So the correct pairing is anterior (for motor output) and posterior (for sensory input).

Answer:

D. anterior; posterior (assuming the last option is "anterior; posterior" as there might be a typo like "anterior; posterior" instead of "anterior; postderior")