The presence of ________ dramatically increases the speed at ...

[mspears3]

The presence of ________ dramatically increases the speed at which an action potential moves along an axon.
 A) a capsule
  B) plasma protein
  C) neurilemma
  D) glial cells
  E) myelin

Question 2

The period during which an excitable membrane can respond again, but only if the stimulus is greater than the threshold stimulus, is the ________ period.
 A) relative refractory
  B) absolute refractory
  C) resting
  D) lag
  E) stationary

[dawsa925]

Answer to Question 1

E

Answer to Question 2

A

[mspears3]

Excellent

[ashely1112]

Thanks for the timely response, appreciate it