CNS test 2- Innervation of the skin

Question 1

small part of a dermatome where a sensory unit can be excited

Answer 1

receptive field

Question 2

the entire neuron will cell body located in DRG

Answer 2

sensory unit

Question 3

strip of skin innervated by a single spinal nerve

Answer 3

dermatome

Question 4

Sensory transduction

Answer 4

tranformation of a stimulus into an electrical signal

Question 5

phasic receptors, response quickly to and maximally at onset of stimulus, but stops responding even if the stimulus continueus

Answer 5

Rapidly Adapting receptors

Question 6

essential in responding to changes (due to high sensitivity) but ignore ongoing processes such as wearing a watch

Answer 6

rapidly adapting receptors

Question 7

tonic receptors that continue to responds as long as stimulus is present

Answer 7

slowly adapting receptors

Question 8

close to body’s surface, detect sensory info from external environment (senses: touch, smell, sight etc)

Answer 8

Exteroreceptors

Question 9

Transmit sensory info from muscle, tendons, and joints about the position of a body part, such as a limb in space

Answer 9

proprioceptors

Question 10

direct sensory information about body’s internal environment (stretch/bp/pH/O2 etc)

Answer 10

interoceptors

Question 11

nociceptors

Answer 11

rapidly adapting-noxious/painful stimuli

Question 12

sensitive to temperature

Answer 12

thermoreceptors

Question 13

detect physical deformation due to touch/stretch/pressure/vibration

Answer 13

mechanoreceptors

Question 14

non-encapsulated mechanoreceptors

Answer 14

free nerve endingsfollicularmerkel’s discs

Question 15

free nerve endings

Answer 15

found close to surface, transmit pain and temperature, slow adapting

Question 16

Peritrichial, coiled around hair follicles and respond when a hair is bent, touch, rapidly adapting

Answer 16

follicular receptors

Question 17

tactile receptors, special epidermal cells with free nerve endings under them. discriminative touch stimuli allows for distinguishing texture, shape, and edges of objects (slow adapting)

Answer 17

Merkel’s discs

Question 18

Encapsulated

Answer 18

Meissner’s corpusclespacinian corpuscleRuffini’s end organ

Question 19

located in papilla of dermis, rapidly adapting for light touch/fine discrimination

Answer 19

meissner’s corpuscles

Question 20

largest skin receptor, no magnification necessary located on the dermis, responds to pressure, tickling, and vibration, rapid adaptation

Answer 20

Pacinian corpuscles

Question 21

Deeper pressure/shearing/drap slowly adapting

Answer 21

Ruffini’s end organs

Question 22

slow adapting

Answer 22

Free nerve endingsMerkel’s discsRuffini’s end organs (encapulated)

Question 23

fast adapting

Answer 23

Follicular (non encapsulated)Meissner’s corpusclesPacinian corpuscles