Advertisement Upgrade to remove ads

cell theory

All living things are composed of cells. Cells are the basic units of structure & function in living things. New cells are produced from existing cells.

Organelle

specialized structure that performs important cellular functions w/in a eukaryotic cell

Nucleus

structure that contains the cell's genetic material (DNA) & controls its activitiesTranslation of mRNA happens here

Prokaryote

unicellular organism w/out a nucleus; their genetic material is not in a nucleus

Eukaryote

unicellular or multicellular organism whose cells contain nuclei; genetic material is contained in a nucleus

Unicellular / Multicellular

Unicellular- single-celled organismMulticellular-organisms that are made up of many cells

Lipid Bi-Layer

2 layers of lipid (fatty) moleculesfound in cell membrane

Semi-Permeable Membrane

only allows certain or specific items to pass throughcell membrane is semi-permeable

Active Transport

going against the concentration gradientenergy-requiring process that moves material in the opposite direction or across a cell membrane against a concentration differencegoing from a low concentration to a high concentrationrequired energy- ATP used in cellular respiration & sunlight in Photosynthesis

Facilitated Transport

helper molecule required to get through semi-permeable membrane by protein channelsno energy required, it moves w/ the concentration gradientgoing from high concentration to low concentrationEX- salt, sugars, ions, ATP SYNTHASE

Osmosis

diffusion of water across the semi-permeable cell membranewater molecules will move from areas or solutions w/ high concentration to areas w/ lower concentration

Diffusion

process by which molecules tend to move from an area where they are more concentrated to an area where they are less concentrated; once they are equal they are in equilibrium; molecules cont. to move even after equilibrium

Cell

collection of living matter enclosed by a barrier that separates the cell from its surroundsbasic unit of all forms of lifesmallest levelspecialized function

Tissue

made of cellsgroup of cells working together to do a job

Organ

group of tissues working together to perform closely related functions

Organ System

group of organs working together to perform a specific function

Please allow access to your computer’s microphone to use Voice Recording.

Having trouble? Click here for help.

We can’t access your microphone!

Click the icon above to update your browser permissions above and try again

Example:

Reload the page to try again!

Reload

Press Cmd-0 to reset your zoom

Press Ctrl-0 to reset your zoom

It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.

Please upgrade Flash or install Chrome
to use Voice Recording.

For more help, see our troubleshooting page.

Your microphone is muted

For help fixing this issue, see this FAQ.

Star this term

You can study starred terms together

NEW! Voice Recording

Create Set