Chapter 5: The PNS Part A

Question 1

What are the 5 touch receptors?

Answer 1

1) free
2) Merkel’s
3) Meissner’s
4) Ruffini’s
5) Pacinian

Question 2

What are the four types of pain?

Answer 2

1) somatic / body pain
2) visceral / referred pain
3) Neuropathic / chronic pain
4) phantom pain

Question 3

What are the two pain neurons and what are their properties?

Answer 3

1. A delta
   - myelinated (1-5 mini metres)
   - fast pain (6-30 m/s)
   - called “first pain”
2. C
   - unmyelinated ( 0.5-2 mini metres)
   - slow pain (1-2 m/s)
   - dull ache

Question 4

What are the two pain receptors?

Answer 4

1) Amino Mettyl D Aspatate (AMDA)
2) Amibo Mettyl Phosphonic Acid (AMPA)