PRE LECTURE QUIZ  ______________ are the functioning cells of the nervous system.
{"Image DocumentName": "Pre lecture quizT. F.", "Image ImageDescription": "The dorsal horn cell columns contain the afferent (sensory) neurons and the ventral horn cell columns contain the efferent neurons. The brain is divided into three regions: the hindbrain, the midbrain, and the forebrain. The parasympathetic nervous system functions in maintaining vital functions and responding when there is a critical threat to the integrity of the individual\u2014the fight-or-flight response. The blood-brain barrier and the cerebrospinal fluid\u2013brain barrier protect the brain from substances in the blood that would disrupt brain function. Cerebrospinal fluid helps maintain a constant ionic environment that serves as a medium for diffusion of nutrients, electrolytes, and metabolic end products into the extracellular fluid surrounding central nervous system neurons and glia.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}