Practice question

Pick B: They decrease with distance. Thinking about Action potential in a practical way — what the structure does, or what the process achieves — leads you here. Clinically and academically, the same logic shows up again and again: They decrease with distance is the option that correctly names the structure, process, or principle asked for in Action potential. Hence They decrease with distance is correct. Treat this as a building block for the rest of Action potential; neighbouring topics often reuse the same principle. Keep a one-line summary card for this idea and revisit it before the paper; short, repeated review beats long cramming sessions.