Week 7 Flashcards
(21 cards)
respond to touch, pressure, vibration, stretch, and itch
mechanoreceptors=
sensitive to changes in temperature
thermoreceptors=
respond to light energy [e.g. retina]
photoreceptors=
respond to chemicals [e.g. smell, taste, changes in blood chemistry]
chemoreceptors=
sensitive to pain-causing stimuli [noxious]
nociceptors=
respond to stimuli outside the body
-near body surface
Exteroceptors=
respond to stimuli in the body
found in internal viscera and blood vessels
sensitive to chemical changes, stretch, and temperature changes
Interoceptors =
Interoceptors are sensitive to what kind of changes?
chemical changes, stretch, and temperature changes
respond to degree of stretch of the organs they occupy
found in skeletal muscles, tendons, joints, ligaments, and connective tissue coverings of bones and muscles
inform the brain of one’s movements
Proprioceptors (proper term= mechanoreceptor
__________- is receptor awareness of changes in the internal and external environment
sensation
____________ is the conscious interpretation of those stimuli
perception
sensation= at \_\_\_\_\_\_\_\_\_ Perceptions= at \_\_\_\_\_\_\_\_
receptor
cortex
receptor field= _______ proximally,_________ distally
large
smaller
when sensory receptors are subjected to an unchanging stimulus receptor membranes become less responsive and receptor potentials decline in frequency
adaptation
what sense adapt quickly?
pressure, touch, and smell adapt quickly
slow adaptation receptors=
merkells disc, Ruffini corpuscles, and interoceptors (respond to chemicals in the blood)
which receptors do not do adaptation
pain receptors and mechanoreceptors (proprioception)=
loose connective tissue- surronds one axon
Endoneurium
coarse connective tissue that bundles fibers into fascicles (prevents inflammation from getting inside the nerve)
perineurium
tough fires sheath around entire nerve
Epineurium
which nerves carry parasympathetic fibers
3,7,9,10= carry parasympathetic fibers
