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Nervous System

Notes

TermDefinition
Central Nervous System brain and spinal cord
Peripheral Nervous System peripheral nerves through the body
Sensory Function gathers info about changes occurring within and around the body Afferent nerve
Integrative Function information is "brought together," interpreted, to create sensations, create thoughts, add to memory, make decisions
Motor Function response to signals (impulse) maintain stable conditions Efferent Nerve
Somatic Nervous System skeletal muscles
Autonomic Nervous System smooth muscles and glands
Dendrites form the receptive surfaces of neurons
Axons conducts impulse away from the cell body
Neuroglial Cells supportive tissue of the nervous system
Microglial Cells makes sure no garbage and eats what shouldn't be there Brain & Spinal Cord
Oligodendrites produces myelin for CNS Brain & Spinal Cord
Astrocytes blood brain barrier Brain & Spinal Cord
Ependymal Cells secrete cerebrospinal fluid Brain & Spinal Cord
Schwann Cells produces myelin Peripheral
Mylinated white matter
Unmyelinated grey matter
Nerve bundle of nerve fibers
Meninges membrane located between bone and soft tissue of the CNS
Dura mater outer layer, blood vessels, nerves TOUGH
Arachnoid mater no blood vessels WEB LIKE
Pia mater contains many nerves and blood vessels to nourish cells of the brain and spinal CONECTING NEURONS
Cerebrospinal Fluid circulates between arachnoid and Pia mater
Cervical Enlargement supplies nerves to upper limbs (neck)
Lumbar Enlargement supplies nerves to lower limbs (lower back)
CNS Function conducting nerve impulses, serves as a enter for spinal reflexes
Ascending Tracts carries sensory info to the brain
Descending Tracts carry motor impulses from the brain to muscles
Cerebrum Largest, sensory and motor functions, mental function Memory and reasoning
Cerebellum Coordinate voluntary muscles
Brain Stem Regulates autonomic functions (Heart rate, blood pressure, and body temp)
Created by: Alisha M. Bailey