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Neurons & Neuroglia
Cells that make up Nervous Tissue
| Question | Answer |
|---|---|
| astrocyte | CNS glia that braces neurons and creates the blood brain barrier |
| axon | the extra long sending process of a neuron |
| body | the bulk part of the neuron that contains the nucleus & nucleolus; it looks like the head of the neuron |
| CNS | the location of the brain & spinal cord; neuroglia here include astrocytes, microglia, oligodendrocytes, & ependymal cells |
| dendrite | the receiving process of a neuron that conveys impulses towards the cell body |
| ependymal | glia that lines the CNS cavities; cilia helps circulate CSF (cerebrospinal fluid) |
| microglia | glia that controls waste disposal and acts as the immune system of the CNS |
| motor neuron | cell that conducts messages away from the brain towards the effector organ |
| myelin sheath | an insulative lipid (fat) that surrounds some nerve fibers to allow faster impulse conduction |
| nerve | bundle of axons in PNS |
| neuroglia | also known as "glia," support cells that provide neurons with structure, nutrients, and waste removal; they cannot even transmit impulses; in a microscope image, neuroglia appear to be small dots |
| neuron | cell that transmits electrical impulses |
| oligodendrocyte | CNS neuroglia that creates myelin sheaths to wrap around neuron's axons |
| PNS | the location of nerves; neuroglia here include satellite & schwann cells |
| satellite | cells that protect the neuron's cell body in the PNS |
| schwann | cells that form the myelin sheath on the outside of axons (in both CNS & PNS) |
| sensory neuron | cell that conducts messages towards the brain from a sensory organ |