Holes Human Anatomy And Physiology Chapter 10, 11 151 Correctly Answered Questions Latest Update

white matter {Ans: Whitish nervous tissue of the CNS consisting of neurons and their myelin sheaths}sympathetic nervous system {Ans: The division of the autonomic nervous system that prepares the body for fight or flight}cells of the nervous system {Ans: neurons and neuroglia}Dorsal root {Ans: the sensory branch of each spinal nerve}Perception {Ans: Occurs when brain interprets sensory impulses realizing that the pain is a result of stepping on a tack}cell body (soma or perikaryon) {Ans: Central portion of the neuron contains the nucleus, cytoplasm, organelles, neurofilaments, chromatophilic substance(nissal bodies in RER) very unique to neurons}tactile (Meissner's) corpuscles {Ans: Abundant in hairless portions of skin and lips, detects fine touch and texture, distinguish between 2 points on the skin}motor neurons (efferent) {Ans: Transfer instructions from the CNS to effectors(muscle or gland)}Dermatomes {Ans: An area of skin innervated by sensory nerve fibers of a spinal nerve below c1(does not supply skin) Highly organized and vary in shape and size Useful to localize site of injuries in the dorsal root or spinal cord}Composition of mylin {Ans: Schwann cells produce layers of proteins and lipids that wrap around an axon which is a lipoprotein