Refer to the graphs below.In this experiment,researchers studied squid neuromuscular junctions.The graphs show membrane potential at the presynaptic (top)and postsynaptic (bottom)membrane for controls and two treatments.(BAPTA is a chemical that binds Ca2+ ions. )What do the graphs indicate about the role of calcium in transferring an action potential across a neuromuscular junction? 
Definitions:
Intellectual Development
The process through which a person's mental capacities and cognitive functions grow and evolve.
Problem Solving
The process of identifying a problem, finding solutions, and implementing those solutions to resolve the issue.
Authoritative Parent
A parenting style characterized by high expectations of maturity and self-control from children while also being warm, responsive, and supportive.
Permissive Parent
A parenting style characterized by a high level of responsiveness to the child's needs but low demands or control on the child.
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