3033 Exam 2 Vocabulary Flashcards
rest
state of mental/physical relaxation while being awake, alert and responsive to external stimuli
sleep
regular occurring, reversible behavioral state in which consciousness, skeletal muscle activity, metabolism and response to external stimuli are decreased
circadian rhythm
rhythmic biologic clock; complete a full cycle every 24 hours; synchronization occurs when sleep-wake patterns follow the inner biologic clock
BSS
bulbar synchronizing system; pauses sleep; associated with the medulla oblongata in the brain; melatonin (sleep inducer) sometimes released; serotonin is also associated; tryptophan (aa) that is a precursor of serotonin (found in turkey, milk products, banana)
RAS
reticular activating system; wakes us up; receive that sensory input; may release catylcholamines (norepinephrine); network of nerve fibers in the thalamus, hypothalamus, brain stem and cerebral cortex; essential to our wakefulness
REM
rapid eye movement; stage of sleep in which brain is very active, but the body is quiet; vital signs fluctuate; accounts for 25% of normal sleep time; deprivation causes irritability
NREM
non-rapid eye movement; predominate during the first 1/3 of the night; state in which a quiet brain functions in an active body; 75% of total sleep time; comprised of 4 stages
dyssomnia
altered amount or altered quality of sleep
parasomnia
abnormal behaviors or movements during sleep
sundown syndrome
type of agitation in which the patient becomes more confused and agitated in the late afternoon or evening; behaviors include agitation, aggressiveness, wandering, resistance to redirection and increased verbal activity
respiration
gas exchange between the atmospheric air in the alveoli and blood in the capillaries
gas exchange
intake of oxygen and release of carbon dioxide
ventilation
breathing; movement of air into and out of the lungs; involves inspiration and expiration
resistance
result of any impediment or obstruction that air meets as it moves through the airway
bronchodilation
increase in the diameter of airways caused by relaxation of the smooth muscles of the bronchioles
bronchoconstriction
decrease in the diameter of airways caused by constriction of the smooth muscles of the bronchioles