PNS

Question 1

Receptors can be classified by:
1
2
3

Answer 1

1. type of stimulus they detect
2. by body location
3. by their structural complexity

Question 2

Mechanoreceptor

Answer 2

responds to mechanical force such as touch, pressure (blood pressure), vibration, and stretch

Question 3

Thermoreceptor

Answer 3

respond to temperature changes

Question 4

Photoreceptor

Answer 4

respond to light

Question 5

Chemoreceptor

Answer 5

respond to chemicals in solution (smell, taste, changes in blood or interstitial fluid)

Question 6

Nociceptor

Answer 6

respond to potentially damaging stimuli that result in pain

Question 7

Receptors by location
1
2
3

Answer 7

1. Exteroreceptors
2. Interoceptors
3. Proprioceptors

Question 8

Exteroceptors

Answer 8

sensitive to stimuli arising outside the body

Question 9

Interoceptor (visoceptor)

Answer 9

responds to stimuli within the body

Question 10

Proprioceptor

Answer 10

respond to internal stimuli in skeletal muscles, tendons, joints, and ligaments and in connective tissue coverings of bones and muscles.

advise the brain of body movement and how the organs containing these receptors are stretched.

Question 11

general sensory receptors
1
2

Answer 11

1. Encapsulated

2. Non-encapsulated

Question 12

Nonencapsulated
1.
2.
3.

Answer 12

1. Free nerve endings of sensory neurons
2. Modified free nerve endings (Merkel discs)
3. Hair Follicle Receptors

Question 13

Free Nerve Endings
L:
S:

Answer 13

L: Exteroceptors, interoceptors
S: Thermoreceptors (warm/cold), 
chemoreceptors (itch,pH), 
mechanoreceptors (pressure), 
nociceptors (pain, hot, cold, pinch, and chemicals

Question 14

Merkel Discs and where are they found
L:
S:

Answer 14

L: Exteroceptors
S: Mechanoreceptors (light pressure), slowly adapting
basal layer of epidermis

Question 15

Hair Follicle Receptors
L:
S:

Answer 15

L: Exteroceptors
S: Mechanoreceptors (hair deflection), rapidly adapting

Question 16

Meissner’s corpuscles (tactile)
L:
S:
and where are they found

Answer 16

L: Exteroceptors
S: Mechanoreceptors (light pressure, discriminative touch, vibration of low frequency), rapidly adapting
dermal papillae of hairless skin

Question 17

Pacinian corpuscles (lamellar)
L:
S:
and where are they found

Answer 17

L: Exteroceptors, interoceptors, and some proprioceptors
S: Mechanoreceptors (deep pressure, stretch, vibration of high frequency), rapidly adapting
largest and respond only at start of stimuli

Question 18

Raffini endings (Bulbous corpuscles)
L:
S:
and where are they found

Answer 18

L: Exteroceptors, proprioceptors
S: Mechanoreceptors (deep continuous pressure and stretch), slowly or non-adapting
deep in dermis, hypodermis, and joint capsules

Question 19

Muscles Spindles and where are they found
L:
S:

Answer 19

L: Proprioreceptors
S: Mechanoreceptors (muscles stretch, length)
skeletal muscles

Question 20

Tendon Organs and where are they found
L:
S:

Answer 20

L: Proprioceptors
S:Mechanoreceptors (muscle stretch, tension)
tendons

Question 21

Joint Kinesthetic receptors and where are they found
L:
S:

Answer 21

L: Proprioceptors
S: mechanoreceptors and nociceptors
joint capsule of synovial joints