Chapter 7 Section 1

Cell

Basic unit of structure and organization of all living organisms.

Cell Theory

The theory that states all organisms are made of one or more cells, cells are the basic unit of life, and all cells come from other cells.

Plasma Membrane

flexible, selectively permeable boundary that helps control what enters and leaves the cell

Organelle

specialized internal cell structure that carries out specific cell functions such as protein synthesis and energy transformation

Eukaryotic Cells

unicellular organism with membrane-bound nucleus and organelles; generally larger and more complex than a prokaryotic cell

Nucleus

in eukaryotic cells, the central membrane-bound organelle that manages cellular functions and contains DNA

Prokaryotic Cell

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

Microscope

device that produces magnified images of structures that are too small to see with the unaided eye

Electron microscope

microscope that forms an image by focusing beams of electrons onto a specimen

Compound light microscope

microscope that allows light to pass through a specimen and uses two lenses to form an image