Bio | Lesson 7: Cell Membranes and Transport

A type of lipid that makes up the cell membrane, with a hydrophilic (water-attracting) head and hydrophobic (water-repelling) tail.

The movement of molecules across a cell membrane without the use of energy, from an area of high concentration to low concentration.

The movement of molecules across a cell membrane using energy (ATP), from an area of low concentration to high concentration.

The movement of water molecules across a semi-permeable membrane from an area of low solute concentration to high solute concentration.

The process by which certain white blood cells engulf and digest large particles, such as bacteria and dead cells.