Scarlett's mother suffered from multiple sclerosis, an illness that can be disabling to the central nervous system. To help her mother, she decided to pursue research study. She was now a PhD student working in a laboratory to study the role of different transporters in neuronal cells through a series of experiments. In one of the experiments, voltage-gated sodium channels were subjected to several mutations to determine their effects on action potentials. How does threshold potential work? If the mutation causes voltage-gated sodium channels to open at a more negative membrane potential, what effects will this have on neuron signaling?