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3 Cards in this Set
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- Back
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Function of CNS
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*receives input from sensory neurons
*directs activity or motor neurons *sensory: allows brain to know environment so that it knows what it can help *stores memory and perception, thought |
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Examples of protection in the CNS
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*hair and scalp for brian (50% fat)
*vertebral column for spinal cord *meningies: Dura mater (tough), arachnoid membrane, and pia mater *CSF (cranial spinal fluid) *blood brain barrier (regulates so it doesn't deviate from neuro-functions); hormones , chemicals are kept out *location of cell bodies( well protected by spinal cord); all motor neurons are near or around CNS, when cell bodies die-spinal cord dies, sensory neurons are near spinal column * |
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Functions and density of CSF
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*80-150 ml
*lightens the wieght of brian by 30 times (reduces 50g of weight on brain) *likens brain to a no gravity environment *also filters blood that goes to the spinal fluid *is NOT interstitial fluid its extracellular around neurons * |
