Final answer:
A suprathreshold depolarization leads to a sequence of action potentials fired at a higher frequency in the axon, rather than a larger individual action potential or graded response.
Step-by-step explanation:
If the depolarization that reaches the axon is large and suprathreshold, the result is action potentials at higher frequency. Action potentials operate on an "all or none" principle, meaning that once the depolarization threshold is reached, an action potential of a fixed size will occur. A stronger stimulus doesn't create a larger action potential, since all action potentials reach the same peak voltage; however, it can cause action potentials to fire more rapidly.
This rapid firing, or higher frequency of action potentials, can lead to a stronger sensation or a more vigorous muscle contraction. But it's important to note that the size or amplitude of individual action potentials remains consistent, regardless of the strength of the stimulus after the threshold is reached.
Thus, when considering the provided options, the correct response would be that a larger and suprathreshold depolarization will result in action potentials at higher frequency in the axon.