Answer:
True.
Step-by-step explanation:
A cell membrane is a selective (otherwise called semipermeable membrance) through which some particles passes through based on degree of concentration or availability of such particles within and outside the cell.
The cell membrane acts on the principle of osmosis where particle (fluids) are allowed to flow from a region of low concentration to a region of high concentration through a semipermeable membrane.
The right answer is thus true.