Test 4 Review Pain and Senses Flashcards
Stimulus
trigger that stimulates receptor
meaning depends on reception and processing
reception
process of receiving stimuli from nerve endings
occurs through receptors
thermoreceptors
temperature
proprioceptors
skin, muscles, tendons, ligaments, joints, sense position
photoreceptors
light in retina
chemoreceptors
in taste buds (taste); olfactory epithelium (smell)
mechanoreceptors
skin, hair follicles (pressure, touch, vibration)
hair cells
ear (cochlea) detect sound waves; vestibular apparatus for balance
perception
ability to interpret sensory impulses; give meaning to impulses
perception is affected by
location of receptor, number of receptors activated; frequency of action potentials and changes in all three
arousal
composed of consciousness and alertness
mediated by reticular activating system (RAS)
arousal affected by
environment
medicatations
response to sensations are affected by what factors
intensity of stimulus
contrasting stimuli
adaptation to stimuli
previous experience
the response to sensations requires people to be
alert and receptive to the stimulation
What do these factors affect?
age/stage of life culture illness medications stress personality lifestyle
presbyopia
inability to focus on close objects