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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 |