Answer:
The blanks will be filled by following words - inside, open
Step-by-step explanation:
The sentence in the question tells about the mechanism of closing of stomata in plant cells and the role of potassium ions in closure of stomata. The completed statement will be -
Potassium ions are actively pumped out of the guard cells. When K are pumped in, the inside of the cell is hypertonic relative to the outside of the cell that is hypotonic. Subsequently, water moves inside the guard cells, the guard cells bulge and the stomata open.