Cellular Structure and Function

Basic unit of structure and organization of all living organisms.

Microscopic, unicellular organism without a nucleus or other membrane-bound organelles.

Property of the plasma membrane that allows it to control movement of substances into or out of the cell.

Plasma membrane layers composed of phospholipid molecules arranged with polar heads facing the outside and nonpolar tails facing the inside.

Net movement of particles from an area of higher concentration to an area of lower concentration

Semifluid material inside the cell's plasma membrane.

Vesicle that uses enzymes to digest excess or worn-out cellular substances.

Supporting network of protien fibers that provide a framework for the cell within the cytoplasm.

Membrane-bound vesicle for temporary storage of materials such as food, enzymes, and wastes.

A solution that has a lower concentration of solute outside than inside the cell, causing water to flow into the cell by osmosis.