Neurons and Nervous System Practice Test 2026 – Your Complete Guide to Mastering Signal Transmission!

The dorsal root ganglion is where the cell bodies of primary sensory neurons reside. These neurons are typically pseudo-unipolar, with a peripheral process reaching a sensory receptor and a central process entering the spinal cord. Because their cell bodies sit in the ganglion, you find a cluster of neuronal cell bodies just outside the spinal cord along the dorsal root. The dorsal root itself carries the sensory fibers into the spinal cord but doesn’t contain neuron cell bodies. The anterior (ventral) horns hold motor neuron cell bodies that send signals to muscles. White matter consists of myelinated axons forming tracts, not cell bodies. So, this structure is defined by containing the cell bodies of sensory neurons.