sensory receptors Flashcards
what are somatic sensory receptors?
modified or free nerve endings of sensory neurones
what are the special sense receptors?
receptor cells that synapse with sensory neurone
what do mechanoreceptors respond to
physical distortion
what are the subtypes of mechanoreceptors
- meissner’s corpuscles
- merkel’s disk
- ruffini’s corpuscles
- pacinian corpuscles
- free nerve endings
which mechanoreceptors are rapidly adapting
meissner’s and pacinian corpuscles
what mechanoreceptors are slow adapting
merkel’s disks and ruffini’s endings
where are thermoreceptors located and what form are they in
skin, they are free nerve endings
in thermoreceptors - what are the ion channels called and what temps do they respond to
TRPV1- hot, TRPM8 - cold
where are nociceptors found and what do they respond to
in skin, respond to stimuli with the potential to cause tissue damage
3 different types of nociceptors
mechanical, thermal, chemical
where are proprioceptors found and what are their stimuli
found in muscles, tendons, ligaments and joints. Respond to muscle tension
subtypes of proprioceptors
muscle spindles, golgi tendons, joint proprioceptors
what is the receptive field
area in which the specific stimulus will activate the sensory receptor
where are the cell bodies of primary afferent neurones located
just outside spinal cord - in the dorsal root ganglia
what pathway relays information about touch and proprioception
dorsal column-medial lemniscal pathway
