Answer: Hello the options related to your question is missing attached below are the missing options
answer : Calcium channels would remain closed, causing the neural impulse to travel back to the cell body. ( B )
Step-by-step explanation:
When the membrane potential at the synaptic terminal does not cross the given threshold to an open Voltage-gated calcium channels, the propagation of the neural impulse will travel back to the cell body and this is caused by the calcium channels to remaining closed