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21 Cards in this Set
- Front
- Back
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All sensory information arrived in the spinal cord from neurones in...?
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dorsal root ganglia.
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Sensor stimuli produce what type of receptor potential?
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Graded potential
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Magnitude of s stimuli is encoded for how?
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the frequency of impulses
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Quality of a stimuli is denoted how?
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By which receptor is activated.
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Slowly adapting cutaneous mechanoreceptors signal what type of skin contact?
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Prolonged skin contact
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Rapidly adapting cutaneous mechanoreceptors signal what type of skin contact?
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swift changes - vibration
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Give two examples of Rapidly adapting cutaneous mechanoreceptor?
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Meissner's and Pacinian corpuscles
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Give two examples of slowly adapting cutaneous mechanoreceptor?
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Merkle's disk and Ruffini endings
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What type of receptor would measure stretch in joints?
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Ruffini endings
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What type of receptor would be used to read brail (fine touch)?
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Merkel's disk?
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What is the axon reflex?
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Vasodilation and inflammatory peptides are liberated around the site of a harmful stimuli - mediated by silent nociceptors
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What are the two types of nociceptors?
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some respond to extreme mechanical stimuli while others (silent nociceptors) respond to inflammatory molecules from damaged cells or Mast cells
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What are the two types of Thermoreceptors?
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Warm unity >37 degrees. Cold units <37 degrees
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What are the main two types of proprioceptors?
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M. spindles and Golgi tendon organs.
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What do M. spindles sense?
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M. stretch
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What do Golgi tendon organs sense?
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loading or tention
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Give an example of a reflex mediated by a Proprioceptor
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The anti-gravity reflex.
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What class of afferent fibres run from proprioceptors?
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A-alpha (myelinated)
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What class of afferent fibres run from cutaneous receptors?
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A-beta (myelinated)
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What class of afferent fibres run from thermoreceptors?
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A-delta (myelinated)
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What class of afferent fibres run from nociecptors?
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A-delta (myelinated) and C (unmyelinated)
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