Physiology - Sensory

أطباء 2020
Quiz by أطباء 2020, updated more than 1 year ago
أطباء 2020
Created by أطباء 2020 over 6 years ago
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Description

Quiz on Physiology - Sensory, created by أطباء 2020 on 11/23/2014.

Resource summary

Question 1

Question
In sterognosis, all of the following are true EXCEPT
Answer
  • Highly educated sensation
  • Mixed sensation
  • needs previous experience and intact sensory association cortex
  • intact in case of lesion in sensory cortex

Question 2

Question
the most specific synapse is
Answer
  • Axosomatic
  • Axoaxonic
  • Axodendritic

Question 3

Question
Regarding fine touch
Answer
  • Slowly adapting
  • carried by Ab aferent
  • Transmit through anterolateral system
  • Poorly localized sensation perceived at the thalamus

Question 4

Question
Enkephalin blocks pain transmission by:-
Answer
  • blocking the response of pain receptors to painful stimuli
  • Slowing down transmission of pain impulses through synapses in the pain Pathway
  • Inhibiting the response of the cerebral cortical somatic sensory area to pain Signals
  • Blocking Ca ++ channels in the central terminals of pain sensory fibers

Question 5

Question
IPSP differs from EPSP in:-
Answer
  • being of shorter duration
  • being unable to summate spatially
  • Moving the membrane potential away from threshold
  • Depending upon opening of voltage Na + channels

Question 6

Question
Intermittent Claudications evoke:-
Answer
  • Fast pain
  • Visceral pain
  • Deep pain
  • Cutaneous hyperalgesia
  • Colicky pain

Question 7

Question
Astereognosis:-
Answer
  • indicates inability to localize the site of touch on the body surface
  • Results from lesions of the secondary somatic sensory area
  • Somatic Association area malfunction
  • Results from loss of crude touch sensation

Question 8

Question
Presynaptic inhibition depends upon:-
Answer
  • Augmented realease of neurotransmitter from presynaptic terminal
  • Continued depolarization of presynaptic terminals
  • GABA receptors in presynaptic terminals
  • Opening of voltage-gated Ca ++ channels in presynaptic terminals

Question 9

Question
Synaptic fatigue is due to: -
Answer
  • decreased synthesis of neurotransmitters
  • Inability to release neurotransmitters by exocytosis
  • Failure of action potentials to open voltage-gated Ca ++ channels in Presynaptic terminal
  • Imbalance in between rates of synthesis and release of neurotransmitters

Question 10

Question
Reaction to pain includes all the following, except:-
Answer
  • increased heart rate
  • Depression
  • Withdrawal reflexes
  • Stoppage of impulse discharge from nociceptors in chronic painful conditions
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