Receptors Flashcards
Site and function of free nerve endings
Site :
Skin , cornea and mucus membrane of viscera
Functions :
Detect pain and temperature
Which receptor form basket like aborization?
Perticheal nerve ending around hair follicle
Functions of plexus of bonnet (perticheal)
Mechanoreceptors, displacement of hair
Which receptor helps you to hold a pen
Merkel s deck
Site of Merkel’s deck
Palm
Sole
Transition area between hairy and non hairy skin
Which receptor helps blind people to learn BRAILLE tactile code ?
Meissener corpusclse
Site and function of meissener cor.
Site:
Dermal papillae of palm , sole , finger tips, external genitalia
Fun:
Fine touch
2 points discrimination
Receptors responsible for proprioception
Pacinan corpuscle
Ruffini corpuscle
Muscle spindles
Free nerve endings
Which receptor run in collegen ground substance
Ruffini
Pacinian
Site and function of ruffini corpuscle
Site
Dermis of palm and sole parallel to skin surface
Function
For pressure sensation
Detect tension of collagenous fibers in the surrounding ct
Which type of Motor fibers (efferent) supply muscle spindles
Small gamma fibers
Structure of muscle spindle
Bag
1-4 in number (few)
thich & long, the central part is expanded and contains numerous nuclei
Chain
up to 10 (numerous)
thin & short, the central part is narrow & contains a chain of nuclei
Sensory innervation of muscle spindle
Primary afferent
(Annulospiral )
On the central - non contrcatile - part of bort bag and chain
Secondary afferent (flower)
On the sides of annulospiral (central part ) of nuclear chain only
Motor innervation of muscle spindle
Small gamma fibers from peripheral - contractile - part of both.
Golgi tendon organ innervation
NO motor innervation
Sensory :
primary afferent
