Fiber Types

Question 1

A Fiber:

Answer 1

• myelinated
• short absolute refractory period
• largest diameter axon (5 - 20 micrometers)
• fastest nerve impulse transmission (27 - 280 mph)

Question 2

B Fiber:

Answer 2

• myelinated
• medium absolute refractory
• axon diameter (2 - 3micrometers)
• medium impulse transmission (32 mph)

Question 3

C Fiber:

Answer 3

• unmyelinated
• longest absolute refractory period
• smallest axon diameter (0.5 - 1.5 micrometers)
• slowest impulse transmission (1 - 4 mph)