nerves
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Created by:
ninjastrackmimes on April 29, 2011
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29 terms
Terms | Definitions |
|---|---|
 cns | RESPONSIBLE FOR INTEGRATION |
| interneurons | nerve cells that connect sensory and motor neurons |
| reflex | automatic rxn involving spinal cord; protective function |
| voltage | membrane potential across plasma membrane; localized electrical gradient |
| graded potentials | changes in membrane potential |
| hyperpolarization | more negative:gated potassium channes open and potassiom diffuses out |
| depolarization: | more positive, sodium goes into cell |
| action potential | occurs in axons only as result of reaching threshold which is about -55 |
| refractory period | neuron cannot depolarize in response to another stimulus, undershoot, sodium channels closed assure one way direction |
| saltatory condition | only nodes of ranvier (unmylinated regions) of axon depolarize, impulse moves faster |
| white matter | myelinated axons |
| gray matter | unmyelinated axons, nuclei, dendrites |
| forebrain | cerebrum, thalamus, hypothalamus, cerebral cortex and pituitary gland |
| midbrain | center for receipt and integration of sensory information |
| hindbrain | pons, medulla oblongata, cerebellum |
| cerebrum | most highly evolved structure of brain, left and right hemishperes, integrating center for memory, learning, etc. frontal, temporal, occipital, parietal lobes |
| corpus callosom | major connection between 2 hemispheres |
| thalamus | integrating center, regulate what information goes to cerebral cortex |
| hypotahlamus | homeostasis, endocrine and nervous systems, secretes hormoes of posterior pituitary and regulates anterior pituitary, thermostat, autonomic activity, biological clock |
| pituitary gland | endocrine, hormones |
| pons | aids medulla oblongata with autonomic funcitons |
| medulla oblongata | autonomic functions |
| cerebellum | unconscious coordination of movement and balance |
| left vs right | logic vs arts |
| limbic system | hippocampus, olfactory cortex emotion |
| amygdala | recognize emotion |
| frontal lobes | short term memory |
| hippocampus | longterm memory |
| pns | can repair itself |
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