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Neurons
| Term | Definition |
|---|---|
| central nervous system | made of the brain and spinal cord |
| peripheral nervous system | all nerves other than brain or spinal cord |
| efferent nerves | send impulses away from the CNS |
| afferent nerves | send impulses towards the CNS |
| autonomic nervous system (unconscious) | involuntary muscle control |
| somatic nervous system (conscious) | voluntary muscle control |
| neuroglia | create a supportive framework for neurons |
| astrocytes | neuroglia that wrap around capillaries |
| microglia | neuroglia that fight infections in the CNS |
| ependymal cells | neuroglia that maintain cerebrospinal fluid |
| oligodendrocytes | neuroglia that make up the myelin sheath |
| satellite cells | neuroglia in the PNS that support neuron cell bodies |
| schwann cells | neuroglia in the PNS that produce myelin sheaths |
| dendrites | part of the neuron that receives the nerve impulse from senses |
| axon | the pathway a nerve impulse travels after leaving the cell body of a neuron |
| nodes of ranvier | allows the nerve impulse to jump, moving more quickly |
| bipolar neurons | neurons with 2 processes |
| unipolar neurons | neurons with 1 process |
| multipolar neurons | neurons with many processes; most of your neurons are this type |