I think it’s the cell membrane if you’re talking about animal cells and plant cells.
Answer:
It depends on the objects mass, the gravitational pull when up or down slopes, and the height of the reference point
boyles law states that the volumes of a gas will decrease as pressure increases if the temperature remains constant.
charles law states that the volume of a gas will increase as temp increases if the pressure remains constant.
gay-lussacs law states that the pressure increases as temp increases if the volume remains constant.