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a and p lab sem. 2
senses- touch, taste, pain
| Question | Answer |
|---|---|
| what do the results of the two-point determination exercise tell you about the distribution of of touch receptors? | the distribution is not uniform; varies considerable |
| what specific type of touch receptor was examined in the two-point determination exercise? | tactile (meissner's) corpuscles |
| what must occur in order for you to be able to distinguish 2 seperate yet simultaneous touches? | 2 seperate receptors must be stimulated |
| what nerves are responsible for the sensations of touch from the different regions of the body? | CERVICAL PLEXUS: head, neck, shoulders BRACHIAL PLEXUS: chest, shoulders, upper limbs INTERCOSTAL NERVES: chest upper abdomen LUMBOSACRAL PLEXUS: lower limbs |
| why did you sometimes feel a touch without a sensation of temperature? | thermoreceptors may have adapted, so only the tactile corpuscles were stimulated enough to respond |
| *why did the mass cause pain that was difficult for the patient to pinpoint? | chronic nerve pathways stimulated and sensation is widespread |
| *why is pain originating from the skin, muscle, or bone (the "outer" body)easier to pinpoint than pain originating from an organ within the ventral body cavity? | most likely acute pain pathways were stimulated, which are myelinated and allow for more definite location of pain. internal organs also respond to displacment, so neighboring organs may be stimulated but these are not the origin of sensation |
| *what are some typical symptoms associated with visceral pain? | aching pain that has no specific origin; dull or throbbing yet presistent; relief difficult to obtain |
| *thesympatheticnervoussystemisassociatedwithhelpingthebodytoreactoradjusttoastressfulsituationandpreparesthe body for an increase in physical activity or alertness. what are some typical syspathetic cardiovascular and pulmonary response to pain or stress? | increased heart rate, blood pressure, and respiratory rate; increases awareness |
| *does this potential cascade of sympathetic responses improve the patient's ability to locate the pain source? why or why not? | no, the increase in general arousal of several body systems only makes localization of the pain source more difficult |
| **following exercise, an individual complains of pain in his neck, left shoulder, and left arm. why are these symptoms considered to be indicative of a possible problem with the heart? | the heart and left arm region share a common nerve path way to the brain. the brain often projects the source of pain originating in the heart to the left arm |
| what is the name of the region of the ethmoid bone that contains the tiny openings through which nerve fibers from the olfactory receptors pass? | cribiform plate |
| define sensory adaptation | "getting used to it"; the process by which senses become less sensative to stimuli that are constantly present |
| as a person ages, they are more likely to experience a decrease in olfactory sensation than in taste sensation. why? | becauseolfactoryreceptorsaretheonlynervesexposed to the environment they are more likely to be damaged and lost as a person ages. what taste molecules bind to on the toungs aren't the nerves themselves but epithelial cells, which are continuously replaced |
| hyper- | heightened |
| hypo- | diminished |
| a(n)- | absence |
| dys- | distorted |
| -osmia | sense of smell |
| -geusia | sense of taste |
| the maxillary division of the trigeminal nerve exits through the __________ ___________ out to the _____________ __________ _________ | foramen rotendum out to the inferior orbital fissure |
| the ophthalmic division of the trigeminal nerve exits through the __________ ____________ ________ | superior orbital fissure |
| the vagus and glossopharyngeal nerves exit through the __________ __________ | jugular foramen |
| the mandibular division of the trigeminal nerve exits through the __________ _________ | foramen ovale |
| where is sweet usually precived on the tounge | tip of the tounge |
| where is salt usually precived on the tounge | widley distributed |
| where is sour usually precived on the tounge | margins of the tounge |
| where is bitter usually precived on the tounge | back of the tounge |
| where is umami usually precived on the tounge | undertermined |
Created by:
allijeli
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