Cell Vocab!

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Prokaryotic

Unicellular organism that lacks a nuculeus

Eukaryotic

Organism whose cells contain a nucleus

Organelles

Specialized structure that preforms important celluar functions within a cell

Light Microscope

Allows light to pass through a speciman and uses two lenses to form an image

microscope stage

the part of the microscope that supports the slide being observed 

Electron Microscope

Uses beams of electrons focused by magnetic feilds. Much higher resolution

Diffusion

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

Facilitated Diffusion

process of diffusion in which molecules pass across the membrane through cell membrane channels.

Osmosis

Diffusion of water through a selectively permeable membrane

Active Transport

The movement of materials against a concentration difference is known as active transport, requires energy

Passive Transport

The movement of molecules and other substances from one side of the membrane to the other side 

exocytosis

many cells release large amounts of material

endocytosis

taking materials into the cell by means of infolding or pockets of the cell membrane

hypotonic

when comparing 2 solutions, the solution with the less concentration of solutes

hypertonic

when comparing 2 solutions with the greater concentration of solutes.

Isotonic

when the concentration of 2 solutions is the same

Selectively Permeable

Property of biological membranes that allows some substances to pass across it while others cannot. Also called semipermeable membrane

Cell Theory

All living things are composed of cells, cells are basic units of structure and function in living things. New cells are produced through existing cells

homeostasis

relatively constant internal, physical, and chemical conditions that organisms maintain.