In the synaptic cleft, three nursing students discussed what would have to be absent to prevent the action potential from moving from the pre-synaptic membrane to the post-synaptic membrane:
1) Debra suggested that Ca++ would have to be missing to prevent the action potential from moving from the pre-synaptic membrane to the post-synaptic membrane.


2) Larry stated that Ca++ would have to be missing because it is the neurotransmitter that takes the messages from the pre-synaptic membrane to the post-synaptic membrane.


3) Timothy thought that the secretory vesicles would have to be absent to prevent the action potential from moving from the pre-synaptic membrane to the post-synaptic membrane since it contains the neurotransmitter responsible for taking the message from one membrane to the next.

(HELP NEEDED ASAP. THANK U SO MUCH)