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Physiology final
Term 2 review
| Term | Definition |
|---|---|
| central nervous system | contains the brain and spinal cord |
| peripheral nervous system | contains nerve tissue that lie in the outer region |
| somatic nervous system | regulates the somatic effectors |
| autonomic nervous system | carry information to the visceral effectors or smooth muscles |
| enteric nervous system | intestinal system, has a network of integrators and feedback loops that act independently |
| neurons | excitable cells that conduct impulses |
| two types of cells in the nervous system | glia, neurons |
| 5 types of glia | astrocytes, microglia, ependymal, oligodendrocytes, Schwann cells |
| myelin sheath | layers of Schwann cells that contain white, fatty substance myelin |
| blood-brain barrier | maintains stability of the brain for normal function |
| number of neurons in the brain | over 100 billion |
| neurons consists of | cell body, axon, and dendrites |