Term
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Definition
| pathway for signals between brain and body |
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Term
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Definition
| AKA soma, contains nucleus and other organelles |
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Term
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Definition
sensory processes that extend from cell body
non myelinated
recieve info |
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Term
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Definition
| insulation around an axon, speeds up action potential |
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Term
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Definition
two types
oligodendrocytes
schwann cells |
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Term
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Definition
sheath peripheral neurons
assist in regeneration of damaged fibers |
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Term
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Definition
neurons of CNS
speed up signal conduction |
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Term
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Definition
| gaps in the myelin sheath |
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Term
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Definition
| neuron cell bodies, dedrites, and synapses |
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Term
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Definition
bundles of axons
myelin makes it white |
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Term
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Definition
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Term
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Definition
| cranial and spinal nerves |
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Term
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Definition
| quick, involuntary, stereotyped |
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Term
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Definition
| signal for reflexes travels via the REFLEX ARC |
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Term
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Definition
| in the skin, a muscle, or a tendon. |
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Term
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Definition
| carry info from receptors in the posterior horn of the spinal cord to the brainstem |
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Term
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Definition
| point in which there is synaptic contact between neuron and gray matter of spine or brain. |
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Term
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Definition
| carry motor impulses to skeletal muscles |
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Term
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Definition
often a muscle fiber
responds to the efferent impulses |
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Term
| stretch (myotatic) reflex |
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Definition
helps maintain posture and equilibrium
important in vigorous and precise movements |
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Term
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Definition
contraction of a muscle when its tendon is tapped
famous patellar reflex
helps prevent injuries |
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Term
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Definition
| reflex arc with only 1 synapse |
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Term
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Definition
| muscles relaxing to acommodate the flexing of another |
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Term
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Definition
withdrawel of limb i nresponse to injurous stimulus
stepping on nail or cactus thorn |
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Term
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Definition
| pathway involves many synapses |
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Term
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Definition
| sensory input and motor output on same side of spinal cord |
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Term
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Definition
| sensory input and motor output are on opposite sides of spinal cord |
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Term
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Definition
| nerves that respon to stretch or pressure |
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Term
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Definition
sensory(afferent)
motor (efferent) |
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Term
| 2 divisions of motor (efferent) division |
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Definition
ANS (autonomic nervous system) - involuntary
somatic nervous system - voluntary |
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