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Questions and Answers
What protects the central nervous system (CNS)?
What protects the central nervous system (CNS)?
- None of the above
- Physical and chemical barriers (correct)
- Surrounding muscles
- Involuntary reflexes
What can cause peripheral neuropathy?
What can cause peripheral neuropathy?
- Overconsumption of caffeine
- Physical exercise
- Genetic, metabolic, inflammatory, infectious, or toxic conditions (correct)
- Emotional stress
What prevents nerve fibers from regrowing in the spinal cord?
What prevents nerve fibers from regrowing in the spinal cord?
- Scar tissue (correct)
- Chemical interactions
- Temperature changes
- Mechanical pressure
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Study Notes
- The central nervous system (CNS) is protected by physical and chemical barriers.
- The brain and spinal cord are surrounded by tough meningeal membranes and enclosed in bones.
- The blood-brain barrier prevents most chemicals from entering the CNS.
- Damage to the CNS has more serious consequences than damage to the peripheral nervous system (PNS).
- Nerves can be damaged by physical trauma, swelling, or bruises.
- Peripheral neuropathy can be caused by genetic, metabolic, inflammatory, infectious, or toxic conditions.
- Nerves can temporarily lose function due to mechanical pressure, temperature changes, or chemical interactions.
- Spinal cord injuries can result in loss of sensation or movement.
- Scar tissue in the spinal cord prevents nerve fibers from regrowing.
- CNS protections make it less susceptible to damage, but damage can have serious consequences.
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