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41 terms

Chapter 7

anatomy
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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