Joan, a neuroscience graduate student, is asked by her laboratory mentor to study the communication of two neurons grown in a petri dish.

Joan, a neuroscience graduate student, is asked by her laboratory mentor to study the communication of two neurons grown in a petri dish. she is asked to stimulate an action potential in the first neuron, which will send a depolarizing stimulus to the second, "receiving" neuron However, her mentor would also like her to block the receiving neuron from generating an action potential. How can Joan accomplish this?