Lab 22: General sensation Flashcards
interoceptor
responds to stimuli arising from within the body
extreroceptor
responds to stimuli outside internal environment. Found closest to the bodies surface
Backing into a sun heated iron railing
exteroceptor
pain receptor
Soemone steps on your foot
exteroceptor
pain receptor
Reading a book
exteroceptor
photoreceptors
Leaning on elbows
exteroceptor
pancinian corpuscles and proprioceptors
Doing sit ups
intereceptors
proprioceptors
the too full sensation
interoceptor
visceral receptors
seasickness
exteroeceptor
equilibrium apparatus of the inner ear
explain how the sensory receptors act as transducers
they change environmental stimuli into afferent nerve impulses
define stimulus
anything that can trigger a response
what is demonstrated by a two point discrimination test
the demonstration is testing touch receptors, and how they are distributed in different areas of the body
how well did the results correspond to your predictions
my predictions were off. the space between the touch receptors was greater than expected
what is the relationship between the accuracy of the subjects tactile loclization and the results of the two point discrimination test
the distance of both were not closely similar
define punctuate distribution
the clustering at certain points of sensory receptors. they are not distributed uniformly
which cutaneous receptors are the most numerous
pain receptors
Which two body areas were most sensitive to touch
lips, finger tips
which two body areas tested were least sensitive to touch
ventral forearm, back of the neck
where would referred pain appear if the following organs were reciving painful stimuli
- galbladder
- kidneys
- appendix
- right inferior thorax
- lumbar
- right lower quandrant
where was referred pain felt when the elbow was immersed in ice during the laboratory experiment
upper arm (medial)
What region of the cerebrum interprets the kind and intensity of stimuli that cause cutaneous sensations
somatosensory area
define adaptiation of sensory receptors
when the receptor discharge slows and conscious awareness of the stimulus declines or is lost until some type of stimulus change occurs
why is it advantatious to have pain receptors that are sensitive to all vigerous stimuli, whether heat, cold or pressure
to warn you quickly of harm or dangers that are happening to your body
Why is the nonadaptability of pain receptors important
if we could adapt to pain easily we would not recognize continued conditions that could affect us
imagine yourself without any cutaneous sense organs. why might this be dangerous
you will not know if you are in danger. you could cut yourself badly and get an infection or die without being able to detect it, protect yourself, or seek medical care in time
what is the probable explaination of referred pain
referred pain happens when nerve fibers from regions of high sensory input and nerve fibers from regions of normally low sensory input happen to converge on the same levels of the spinal cord
define referred pain
the phenomenon of pain percieved at a site adjacent to or at a distance from the site of an injured organ
