Chapter 19 Part 1 Flashcards
Conscious awareness that occurs in cerebral cortex
Perception
A decreased sensitivity of receptors during prolonged stimulation
Adaption
Varies with receptor types and includes rapid; adaptors such as smell or touch slow adaptors such as body positions and pain
Adaption rate
Free nerve endings are structurally bare dendrites
Structurally receptor types
Mechanoceptors,nocieptor, thermoseptor,osmoreceptor
Functional receptor types
Conscious or subconscious change in the external or internal environment
Sensation (stimulus)
Pain
Neuoceptor
Temperature
Thermoseptors
Touch and pressure
Mechanoreptors
Blood pressure
Osmoreceptors
Messenier,hair root plexus,merkel discs, ruffuni corpuscles
Touch receptors
Corpuscles located in dermal papillae of dermis
Messiener
Surrounds and detects hair movement
Hair root plexus
Located in stratum basale of epidermis
Merkel discs
Located in deep dermis
Ruffuni corpocules
Pascian corpocules; detect pressure
Pressure receptor
Free nerve ending located in every tissue except brain and detect pain
Pain receptors (noiceceptors)
Fast,slow,referred
Pain types
Localized acute sharp or pricking pain
Fast pain
Diffuse,chronic,burning,aching and throbbing pain
Slow pain
Pain perceived in skin from involved organ; both supplied by same spinal cord level
Referred pain
The organ with broadest referred pain
Kidney
Provide pain relief
Analgesics
Inhibit formation of chemicals that stimulate nieoceptors
Aspirin and ibuprofen
