Which letter in the figure identifies the anterior internodal ...

[panfilo]

Which letter in the figure identifies the anterior internodal pathway?
 
  a. A c. E
  b. C d. F

Question 2

A muscle cell cannot be depolarized again during which phases of an action potential?
 
  a. End of 0 to the be-ginning of 2 c. End of 1 to the be-ginning of 4
  b. Beginning of 1 to the end of 3 d. Beginning of 0 to the middle of 3

[mceravolo]

Answer to Question 1

ANS: B

Answer to Question 2

ANS: D
The period from the beginning of phase 0 to the middle of phase 3 is referred to as the absolute refractory period or effective refractory period, because regardless of the strength of the stimulus, the myocyte cannot be depolarized again.

[panfilo]

Excellent

[olderstudent]

Thanks for the timely response, appreciate it