Chapter 8

Basic unit of all forms of life

A group of organs that work together to perform a specific function

States that all living things are composed of cells; cells are the basic units of structure and function in living things; and that new cells are produced from existing cells

Organism whose cells contain a nucleus that holds the DNA

Process by which particles tend to move from an area where they are more concentrated to an area where they are less concentrated

Unicellular organism that lacks a nucleus. DNA is not contained inside of a nucleus

Flexible double-layered sheet that makes up the cell membrane and forms a barrier between the cell and its surroundings

Property of biological membranes that allows some substances to pass across it while others cannot; also called a semi-permeable membrane

Process of diffusion in which molecules pass across the membrane through cell membrane channels (Proteins)

Diffusion of water through a selectively permeable membrane

When the concentration of two solutions is the same

When comparing two solutions, the solution with the greater concentration of solutes

When comparing two solutions, the solution with the lesser concentration of solutes

A group of similar cells that perform a particular function

Water channel protein in a cell