Sensory Receptors FA 452 Flashcards Preview

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Flashcards in Sensory Receptors FA 452 Deck (21):
1

Free nerve endings

Description

Location

Senses

C- slow, unmyelinated fibers
A- delta -- fast, myelinated fibers

All skin, epidermis, some viscera

Pain and temperature

2

Meissner corpuscles

Description

Location

Senses

Large, myelinated fibers; adapt quickly

Glabrous (hairless) skin

Dynamic, fine/light touch, position sense

3

Pacinian corpuscles

Description

Location

Senses

Large, myelinated fibers; adapt quickly

Deep skin layers, ligaments, and joints

vibration, pressure

4

Merkel discs

Description

Location

Senses

Large, myelinated fivers; adapt slowly

Finger tips, superficial skin

Pressure, deep static touch (shapes, edges), position sense

5

Ruffini corpuscles

Description

Location

Senses

Dendritic endings with capsule; adapt slowly

Finger tips, joints, soles of feet

Pressure, slippage of objects along surface of skin, joint angle change

6

What is slow adapting

Sends a continuous electrical signal throughout a continuous stimulus

7

What is Rapidly adapting

Sends an electrical signal only at the beginning and end of a continuous stimulus

8

Sensory receptor (fiber)?:

Pricking pain (fast, myelinated)

A-delta fibers

9

Sensory receptor (fiber)?:

Burning or dull pain and itch (slow unmyelinated)

C- fibers

10

Sensory receptor (fiber)?:

Receptor for cold sensation

Free nerve ending--A-delta fibers

11

Sensory receptor (fiber)?:
Receptor for warm sensation

C- polymodal receptor: warm thermorecptor

12

Sensory receptor (fiber)?:
Vibration and pressure

Paciniar corpuscle

13

Sensory receptor (fiber)?:
Dynamic/changing light, discriminatory touch

Meissner corpusle

14

Sensory receptor (fiber)?:
Static unchanging light touch

Merkle discs

15

Sensory receptor (fiber)?:
Proprioception information-- muscle lengthening

Muscle spindle

16

Sensory receptor (fiber)?:
Proprioception information-- muscle tension monitoring

Golgi Tendon organ

17

resembles an onion in cross section?

Pacinian Corpuscle

18

Robust spindle-shaped structures found particularly on the soles of the feet

Ruffini ending

19

Found only in areas of skin without hair (fingertips, lips, eyelids...etc)

Meissner corpuscles

20

Simplest sensory receptor thought to be pain receptor or thermoreceptor

Free nerve ending

21

Touch receptor that is tough to distinguish from melanocytes

Merkle cells