Pain sensation :-a- is evoked by strong stimulation of specific receptorsb- produces reactions that block transmission of pain impulsesc- arises from small encapsulated receptorsd- occurs when the stimulus causes damage of the sensory receptors

Pain sensation :-a- is evoked by strong stimulation of specific receptorsb- produces reactions that block transmission of pain impulsesc- arises from small encapsulated receptorsd- occurs when the stimulus causes damage of the sensory receptors

BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)

10th Edition

ISBN:9781305967359

Author:STARR

Publisher:STARR

Chapter30: Sensory Perception

Section: Chapter Questions

Problem 8SA

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Question

Pain sensation :-
a- is evoked by strong stimulation of specific receptors
b- produces reactions that block transmission of pain impulses
c- arises from small encapsulated receptors
d- occurs when the stimulus causes damage of the sensory receptors

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Cutaneous pain :-a- is always sharp in characterb- is transmitted by Aδ sensory fibersc- is always followed by hyperalgesiad- evokes spasm of nearby muscles
Primary cutaneous hyperalgesia :-a- develops in the normal skin region around the area of flareb- is an abnormal condition in the skin in which painful stimuli become moreseverec- is due to changes in threshold of pain receptorsd- is associated with throbbing type of pain
Pain threshold :-a- is the highest intensity of stimulus that causes painb- is the lowest intensity of stimulus that causes painc- differs markedly among different individualsd- is elevated by substance P
Fine touch :-a- is detected by slowly adapting touch receptorsb- is transmitted by the spinothalamic tractc- is characterized by it emotional affectd- is not involved in feeling the texture of touched objects
Thermal sensations :-a- are evoked by all changes in environmental temperaturesb- are evoked by stimulation of thermo-sensitive pain receptorsc- are involved in regulation of metabolic activityd- are transmitted by Aβ sensory fibers
Fast pain differs from slow pain in :-a- being transmitted in the dorsal column pathwayb- evoking a depressor autonomic reactionc- having a sharp qualityd- arising from encapsulated pain receptors
Double pain sensation that is occasionally felt following painful stimulation of the skin is due to :-a- repetition of the painful stimulusb- presence of dual pain pathwaysc- perception of pain at two different higher centersd- application of two painful stimuli simultaneously at two different sites
Enkephalin blocks pain transmission by :-a- blocking the response of pain receptors to painful stimulib- slowing down transmission of pain impulses through synapses in the pain pathwayc- inhibiting the response of the cerebral cortical somatic sensory area to pain signalsd- blocking Ca ++ channels in the central terminals of pain sensory fibers
Nystagmus :-a- occurs as a result of symmetrical bilateral discharge from the SCCs at the onset of rotationb- occurs as a result of symmetrical bilateral discharge from the SCCs at the end of rotationc- prevents stabilization of the eye balls on visual objectsd- is a vestibulo-ocular reflex
Brown-Sequard syndrome is characterized by all the following, except :-a- loss of vibration sense on the opposite side below level of the lesionb- loss of voluntary movements on the same side below the level of the lesionc- loss of reflex movements on the same side at the level of the lesiond- loss of pain sensation on the opposite side below the level of the lesion
Pain produced by muscle spasm results from :-a- mechanical stimulation of pain receptor by muscle spasmb- decreased release of lactic acid from the spastic muscle fibersc- release of compounds from the spastic muscle which increase the threshold for stimulation of pain receptorsd- decreased oxygen supply to the muscle
General sensations :-a- originate from all sensory receptors of the bodyb- are mediated by somatic sensory fibers onlyc- include the sense of movementd- include the sense of equilibrium