During the relative refractory period, . a. a second action potential cannot be generated, no matter how strong the stimulus. b. the flow of potassium is also depolarizing the neuron. c. another action potential can be generated provided the stimulus is large enough. d. another action potential can be generated provided the stimulus is relatively smaller than the original stimulus.

Explanation:

Refractory period - (1) absolute refractory period and (2) Relative refractory period .

Relative refractory period -It is the interval immediately following the Absolute Refractory period during this period, initiation of a second action potential is inhibited but not impossible.  It is the period shortly after the firing of a nerve fiber when partial repolarization has occurred and only a greater than normal stimulus can stimulate a new response.

the generally accepted parts of modern cell theory include: all known living things are made up of one or more cells. all living cells arise from pre-existing cells by division. the cell is the fundamental unit of structure and function in all living organisms.