PERIPHERAL NERVOUS SYSTEM (PNS) – A&P 1 | PRACTICE QUESTIONS, ANSWERS & STUDY
GUIDE 2026/2027
what makes up the PNS - correct answer ✔✔- All the neural structures outside the brain and
spinal cord.
what is the main function of the PNS? - correct answer ✔✔- it provides a like to and from the
external environment.
list the 5 receptor classifications by stimulus type/ - correct answer ✔✔1. mechanoreceptors
2. thermoreceptors
3. Photoreceptors
4. chemoreceptors
5. nocioreceptors
describe mechanoreceptors. - correct answer ✔✔- sensory receptors that respond to touch,
pressure, vibration, stretch, and itch.
Describe Thermoreceptors. - correct answer ✔✔- sensory receptors that respond to changes in
temperature.
Describe Photoreceptors. - correct answer ✔✔- sensory receptors that respond to light energy.
Describe Chemoreceptors. - correct answer ✔✔- sensory receptors that respond to chemicals.
describe Nocioreceptors. - correct answer ✔✔- sensory receptors that respond to pain-causing
stimuli.
, list the 3 different sensory receptors classified by location. - correct answer ✔✔1.
exteroreceptors
2. interoreceptors
3. proprioceptors
Describe Exteroreceptors. - correct answer ✔✔- respond to stimuli arising from outside the
body.
-found near the body surface.
- sensitive to touch, pressure, pain, and temperature,
- includes special sense organs.
Describe Interoreceptors. - correct answer ✔✔- respond to stimuli arising within the body
- found in the internal viscera and blood vessels.
- sensitive to chemical changes, stretch, and temp changes.
Describe Proprioceptors - correct answer ✔✔- respond to degrees of stretch.
- found in skeletal muscle, tendons, joints, ligaments and C.T.
- constantly advise the brain of one's movement.
what are unencapsulated receptors. - correct answer ✔✔- free dendritic nerve endings.
- respond mainly to temperature and pain.
what are encapsulated receptors. - correct answer ✔✔- muscle spindles and joint receptors.
describe sensation. - correct answer ✔✔- sensation is the awareness of changes in the internal
and external environment.
GUIDE 2026/2027
what makes up the PNS - correct answer ✔✔- All the neural structures outside the brain and
spinal cord.
what is the main function of the PNS? - correct answer ✔✔- it provides a like to and from the
external environment.
list the 5 receptor classifications by stimulus type/ - correct answer ✔✔1. mechanoreceptors
2. thermoreceptors
3. Photoreceptors
4. chemoreceptors
5. nocioreceptors
describe mechanoreceptors. - correct answer ✔✔- sensory receptors that respond to touch,
pressure, vibration, stretch, and itch.
Describe Thermoreceptors. - correct answer ✔✔- sensory receptors that respond to changes in
temperature.
Describe Photoreceptors. - correct answer ✔✔- sensory receptors that respond to light energy.
Describe Chemoreceptors. - correct answer ✔✔- sensory receptors that respond to chemicals.
describe Nocioreceptors. - correct answer ✔✔- sensory receptors that respond to pain-causing
stimuli.
, list the 3 different sensory receptors classified by location. - correct answer ✔✔1.
exteroreceptors
2. interoreceptors
3. proprioceptors
Describe Exteroreceptors. - correct answer ✔✔- respond to stimuli arising from outside the
body.
-found near the body surface.
- sensitive to touch, pressure, pain, and temperature,
- includes special sense organs.
Describe Interoreceptors. - correct answer ✔✔- respond to stimuli arising within the body
- found in the internal viscera and blood vessels.
- sensitive to chemical changes, stretch, and temp changes.
Describe Proprioceptors - correct answer ✔✔- respond to degrees of stretch.
- found in skeletal muscle, tendons, joints, ligaments and C.T.
- constantly advise the brain of one's movement.
what are unencapsulated receptors. - correct answer ✔✔- free dendritic nerve endings.
- respond mainly to temperature and pain.
what are encapsulated receptors. - correct answer ✔✔- muscle spindles and joint receptors.
describe sensation. - correct answer ✔✔- sensation is the awareness of changes in the internal
and external environment.
