Question

fill in the blank question 35 of 42 concepts completed all spinal nerves (except the first one) have two roots. the anterior roots consist of ____ fibers (axons) while posterior roots consist of ____ fibers (axons). need help? review these concept resources.

Explanation:

In the anatomy of spinal nerves, the anterior (ventral) roots of spinal nerves consist of motor (efferent) fibers (axons) that carry signals from the spinal cord to muscles and glands, while posterior (dorsal) roots consist of sensory (afferent) fibers. This is a key concept in neuroanatomy (a subfield of Biology, which is part of Natural Science). So the first blank (for anterior roots) should be filled with "motor".

Answer:

motor