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Nervous System ANAT
| Question | Answer |
|---|---|
| 2 divisions of the nervous system | Central and Periphereal Nervous System |
| what does the CNS (central nervous system) consist of | brain and spinal cord |
| 3 parts of a neuron | dendrites - axon - cell body |
| 2 branches of the peripheral nervous system (PNS) | somatic and autonomic |
| arm-like extensions of the neuron which receive the initial nerve impulse and conducts the impulse into the cell body of the neuron. | dendrite |
| part of the neuron which transmits impulses away from the cell body | axon |
| part of the neuron which contains the nucleus and conducts the nerve impulse toward the axon | cell body |
| autoimmune condition where the myelin sheaths of a myelinated axon degenerate resulting in the gradual loss of motor function | multiple sclerosis |
| white fatty substance that surrounds axon to provide insulation and nutrients - allows nerve impulses to skip down the axon for much faster transmission | myelin |
| the spaces or nodes between the myelinated sheaths on an axon which allow for saltatory conduction | nodes of Ranvier |
| found strictly in PNS - the outer membrane of a Schwann cell - purpose is to regenerate damaged neuron | neurilemma |
| type of nerve conduction that skips down the axon of a neuron via the Nodes of Ranvier in between patches of myelin, thereby speeding up nerve conduction | saltatory conduction |
| nerve tissue consisting of myelinated axons and therefore designed for speed. Controls automatic functions such as breathing, heart rate, and blood pressure. | white matter |
| nerve tissue consisting of unmyelinated axons and designed for processing information. Controls the senses such as hearing, vision, smell, touch, as well as memory and speech. | gray matter |
Created by:
boakes
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