During the relative refractory period the cell may depolarize if

a. the stimulus is much weaker than normal
b. the stimulus is much larger than normal
c. enough potassium ions enter the cell
d. the myelin sheath is thick enough

What is the function of the root cap? a. extra-absorbent cells in the root cap absorb more water and nutrients b. protect the meristematic area of the stem c. contains sensors for sunlight d. increases surface area of the root