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Remy May Physiology
Physiology weeks 1-6
Term | Definition |
---|---|
Glia | Support cells located in the brain, spinal cord, nerves. Structural and functional support of neurons. |
Astrocytes | Central body with many radiating processes located in the CNS. Promote nervous tissue development; provide nutrients to neurons, restore ion balance; help form and regulate synapses; part of blood-brain barrier. |
Microglia | Very small and stationary but can enlarge and move when stimulated. Located in the CNS. Engulf microbes and debris; prune neural circuits. |
Ependymal cells | Form sheets with motile cilia. Located in the CNS. Line fluid space; propel fluid. |
Oligodendrocytes | Central body with processes that wrap around neuron processes. Located in the CNS. Form insulating myelin sheath around CNS nerve fibers, which promotes rapid conduction along neurons. |
Schwann cells | Entire cell wraps around neuron processes; outer portion called neurilemma. Located in the PNS. Form insulating myelin sheath around PNS nerve fibers, which promotes rapid conduction along neurons; promotes regeneration of damaged nerve fibers. |
Neurons | Central body with fiber-like processes. Located in the brain and spinal cord, and nerves. Detect stimuli; conduct impulses; signal other cell. |
Multipolar neurons | Single axon, multiple dendrites. Located in the brain and spinal cord. Conduct information along sensory pathways. |
Bipolar neurons | Single axon; single highly branched dendrite. Located in retina of eye, inner ear, olfactory pathway. Conduct information along sensory pathways. |
Unipolar neurons (pseudounipolar) | Single process branches to form a central and a peripheral process. Located in sensory pathways. |