Final answer:
The slipping away of cells requires energy as cells need to remove and take in larger molecules and particles. This process requires energy because large particles cannot pass through the membrane.
Step-by-step explanation:
The slipping away of cells requires energy. Cells need to remove and take in larger molecules and particles, which cannot pass through the membrane. This process of uptake and release of large particles by the cell requires energy. Cells spend a majority of their energy to maintain an imbalance of sodium and potassium ions between the interior and exterior of the cell.