Final answer:
An increased frequency of action potentials reaching the axon terminal will cause increased neurotransmitter release, resulting in stronger and more efficient communication between neurons or with other target cells.
Step-by-step explanation:
An increased frequency of action potentials reaching the axon terminal will cause increased neurotransmitter release.
Action potentials are the electrical signals that travel down the axon to the axon terminals. When a higher frequency of action potentials reaches the axon terminal, it triggers a greater release of neurotransmitter molecules into the synaptic cleft. This increased neurotransmitter release allows for stronger and more efficient communication between neurons or with other target cells like muscles or organs.
So, an increased frequency of action potentials at the axon terminal enhances the effectiveness of neurotransmission.