Dr. Roberts is testing a new drug that blocks sodium channels in the axons of a neuron. Which of the following statements is correct?

• A. The drug would prevent both the generation of graded potentials and the propagation of action potentials.
• B. The drug would prevent the generation of graded potentials.
• C. The drug would prevent the propagation of action potentials.
• D. The drug would only have a mild effect on the neuron because potassium channels are still operational.