Special Senses

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Author:
Marine
ID:
302263
Filename:
Special Senses
Updated:
2015-06-11 16:15:52
Tags:
physiology physio
Folders:
Physio
Description:
Special Senses
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  1. Eye movement due to contraction of superior rectus muscle is directly antagonised by:
    A. musculus rectus medialis bulbi
    B. musculus obliquus superior bulbi
    C. musculus rectus lagteralis bulbi
    D. musculus obliquus inferior bulbi
    E. musculus rectus inferior bulbi
    B. musculus obliquus superior bulbi
    (this multiple choice question has been scrambled)
  2. Fast adaptation of tactile receptors is caused by:
    A. decrease of firing rate despite the ongoing depression of the receptor
    B. failure of the cerebellum to detect long-lasting sensory stimulationin
    C. return of the receptor towards normal shape despite the lasting pressure
    D. inability of the reticular formation to convert a continuous sensory stimulus.
    E. compensatory mechanism at a level of the basal ganglia
    A. decrease of firing rate despite the ongoing depression of the receptor
    (this multiple choice question has been scrambled)
  3. Unilateral injection of cold water into the outer ear causes vertigo and nausea. The basic cause of this phenomenon is:
    A. temporary immobilisation of otoliths
    B. increase of firing rate in vestibular nuclei as a result of their cooling
    C. reduction of movement of crista ampullaris
    D. cooling-induced flow ot the endolymph
    E. decrease of firing rate in vestibular nerves
    D. cooling-induced flow ot the endolymph
    (this multiple choice question has been scrambled)
  4. Which one of the following physiological mechanisms happens when the auditory system detects the increase of tone pitch?
    A. a greater number of hair cells is activated.
    B. the average firing rate in the auditory nerve will increase.
    C. The auditory cortex is activated with shorter latency.
    D. the largest amplitude of vibrations of the basilar membrane will shift towards the base of the cochlea.
    E. the individual auditory nerve fibres respond to broader range of frequencies.
    D. the largest amplitude of vibrations of the basilar membrane will shift towards the base of the cochlea.
    (this multiple choice question has been scrambled)
  5. The stimulation of the Golgi tendon organ leads to:
    A. increase of activity in afferent type II fibres
    B. reflex inhibition of motonenurones
    C. increase of activity of gamma fibres
    D. contraction of intrafusal muscle fibres
    E. contraction of extrafusal muscle fibres reflex inhibition of motonenurones
    B. reflex inhibition of motonenurones
    (this multiple choice question has been scrambled)
  6. Which one of the following receptor types display, under normal physiological conditions, the greatest degree of adaptation?
    A. muscle spindle
    B. nociceptors
    C. tactile receptors
    D. visceral chemoreceptors
    E. tension receptors in the lungs
    C. tactile receptors
    (this multiple choice question has been scrambled)
  7. Visceral pain:
    A. is conducted by B fibres of the dorsal roots of spinal nerves
    B. has a relatively fast adaptation
    C. can be evoked by a strong and prolonged stimulation of tactile receptors.
    D. is a subjective feeling, unpleasant sensory and emotional experience, related to either actual or potential damage.
    E. resembles fast pain evoked by painful stimulation of the skin
    D. is a subjective feeling, unpleasant sensory and emotional experience, related to either actual or potential damage.
    (this multiple choice question has been scrambled)
  8. The following events, that appear in response to the light, are listed here in random order.
    1. Activation of transducin
    2. Decreased release of synaptic mediator
    3. Structural change of rhodopsin
    4. Closing of Na+ channels
    5. Lowering of intracellular contens of cGMP
    • 3,1,5,4,2
    • 3. Structural change of rhodopsin
    • 1. Activation of transducin
    • 5. Lowering of intracellular contens of cGMP
    • 4. Closing of Na+ channels
    • 2. Decreased release of synaptic mediator
    • 1. Activation of transducin
    • 2. Decreased release of synaptic mediator
    • 3. Structural change of rhodopsin
    • 4. Closing of Na+ channels
    • 5. Lowering of intracellular contens of cGMP

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