Receptors Flashcards
(3 cards)
RECEPTORS:
encapsulated vs. not - #, for, (3.x)
neuromuscular spindle
- muscle type, where
- annulospiral: what
- flowerspray: what, end as
- % innervated by gamma vs. alpha motor
complete anesthesia - how many nere
pain temp tactile area loss
dermatome follows what
hypotonic vs. hypertonic d/t
- encapsulated: 3, for movement/position
- non: 1, for pain, FNE merkel hair
neuromuscular spindle
- in skeletal; in tendons
- annulospiral: large myelinated nerve enters capsule & loses myelin = naked axon winds around bag or chain
- flowerspray: small myelinated nerve enters capsule & loses myelin = naked axon winds around branches & end as varicosities
- 1/3 gamma 2/3 alpha
- complete anesthesia: 3 consecutive nerve
- tactile area loss > pain temp
- dermatome follows embryonic rotation of limbs
- hypertonic: d/t cerebral
RECEPTORS: Nonencapsulated
FNE - region/where (7), for (5), inc (5) dec (2), afferent vs. terminal (myelin), ability for adaptation
merkel - where (3), what (3)
hair follicle - stimulus, what (2)
FREE NERVE ENDINGS
- where: CT, ligament, joint capsule, tendon, periosteum, skin, cornea, dental
- for: fast & slow pain, crude touch, pressure, temp, tickle
- no adaptation
- inc by: serotonin, histamine, bradykinin, lactic, k
- dec by: prostaglandin, substance p
- afferent (either), terminal (nonmyelinated)
MERKEL DISC
- where: hairless, fingertips, follicles
- mechanoreceptors, tonic, A beta
HAIR FOLLICLE
- pull hair then release = stimulate
- phasic, A beta
RECEPTORS: Encapsulated
meissner - where (3), age, for (2), what (2)
pacinian - where (5), for (1), what (2)
ruffini - where (1), myelin, within, what (2)
MEISSNER’S CORPUSCLES
- where: dermis, nipples, external ganglia
- dec c age
- for: touch & 2PD
- phasic, A beta
PACINIAN CORPUSCLES
- where: dermis, nipples, external ganglia, ligament, joint capsule
- for: vibration (600/sec)
- phasic, A beta
RUFFINI’S CORPUSCLES
- where: hairy skin
- unmyelinated, within collagen
- tonic, stretch
