BMSC 207: Module 5 || with 100% Errorless Answers.

what does gray matter consist of? correct answers - consists of unmyelinated somas, dendrites and axons - sensory and motor nuclei what is the white matter? correct answers mainly myelinated axons what is the spinal cord? correct answers major pathways for information flowing back and forth between the brain and the skin, joints and muscles of the body what are the regions the spinal cord is broken up? correct answers - cervical - thoracic - lumbar - sacral - coccygeal Explain the anatomy of each spinal segment correct answers each segment gives rise to a bilateral pair of spinal nerves, each nerve splist into roots what does the dorsal root ganglion do? correct answers - grey matter - afferent somatic sensory information enters dorsal root ganglion into dorsal horn and then into CNS what does the ventral root do? correct answers carries motor (efferent) information to muscles and glands what is nuclei? correct answers clusters of cell bodies in CNS what is ganglia? correct answers clusters of cell bodies in PNS what are ascending tracts? correct answers - white matter - carry sensory info to brain (afferent) - dorsal and external lateral what are descending tracts? correct answers - white matter - carry commands to motor neurons from brain - ventral and interior lateral what is spinal reflex? correct answers when the spinal cord acts as the integrating centre to initiate a response to a stimulus without receiving input from the brain what is spinal reflex important for? correct answers important in body movement, typically protective