Answer:
Our body will swell.
Explanation:
If the plasma membrane wasn't selectively permeable, the cell will swell and burst due to high concentration of water go inside the cell. If the cell has no selectively permeable membrane, the flow of liquid is incontrollable both inside and outside of the cell. The cell maintain homeostasis due to the selective permeability of plasma membrane so if we took shower all the water go inside the cell and our body swells.
