Chapter 7
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Created by:
smashley2232 on March 17, 2012
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Description:
anatomy
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41 terms
Terms | Definitions |
|---|---|
 axon terminal | conducts electrical currents toward the cell body |
| axon | releases neurotransmitters |
| myelin sheaths | location of the nucleus |
| cell body | generally conducts impulses away from the cell body |
| myelin | increases the speed of impulse transmission |
| cerebrum | the largest part of the brain |
| ventricles | cavities found in the brain |
| cerebrospinal fluid | ventricles contain _______ ________ |
| somatic reflex | patellar reflex |
| autonomic reflex | pupillary light reflex |
| somatic reflex | effectors are skeletal muscles |
| autonomic reflex | effectors are smooth muscle and glands |
| somatic reflex | flexor reflex |
| autonomic reflex | regulation of blood pressure |
| autonomic reflex | salivary reflex |
| concussion | slight and transient brain injury |
| contusion | traumatic injury that destroys brain tissue |
| coma | total nonresponsivness to stimulation |
| intracranial hemorrhage | may cause medulla oblogata to be wedge into foramen magnum by pressure of blood |
| cerebral edema | after head injury, retention of water by brain |
| cerebrovascular accident | results when a brain region is deprived of blood or exposed to prolonged ischemia |
| alzheimers disease | progressive degeneration of the brain with abnormal protein deposits |
| multiple sclerosis | autoimmune disorder with extensive demyelination |
| transient ischemic attack | a mini-stroke, fleeting symptoms of a CVA |
| cutaneous sense organs | sensory receptors found in the skin, which are specialized to detect temperature, pressure changes, and pain |
| schwann cells | specialized cells that myelinate the fibers of neurons found in the PNS |
| synapse | junction or point of close contact between neurons |
| tract | bundle of nerve processes inside the cns |
| association neuron | neuron, serving as part of the conduction pathway between sensory and motor neurons |
| nodes of ranvier | gaps in a myelin sheath |
| ganglion | collection of nerve cell bodies found outside the cns |
| efferent neuron | neuron that conducts impulses away from the cns to muscles and glands |
| proprioceptors | sensory receptors found in muscle and tendons that detect their degree of stretch |
| stimuli | changes, occurring within or outside the body, that affect nervous system functioning |
| afferent neuron | neuron that conducts impulses toward the CNS from the body periphery |
| neurotransmitters | chemicals released by neurons that stimulate other neurons, muscles, or glands |
| neuroglia | support, insulate, and protect cells |
| demonstrate irritability and conductivity | neurons |
| neuron | release neurotransmitters |
| neurons | are amitotic |
| neuroglia | able to divide; therefore are responsible for most brain neoplasms |
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