Busy. Please wait.

show password
Forgot Password?

Don't have an account?  Sign up 

Username is available taken
show password


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.
We do not share your email address with others. It is only used to allow you to reset your password. For details read our Privacy Policy and Terms of Service.

Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
Don't know
remaining cards
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

"Know" box contains:
Time elapsed:
restart all cards
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how


Unit vocabulary can be found here.

cell the smallest functional and structural unit of all living organisms.
organism any living thing.
cell membrane a protective layer that covers a cell’s surface and acts as a barrier between the inside of a cell and the cell’s environment.
cytoplasm the region enclosed by the cell membrane that includes the fluid and all of the organelles of the cell.
organelle a small body in a cell’s cytoplasm that is specialized to perform a specific function.
nucleus a membrane-bound organelle where DNA is contained.
prokaryote a single-celled organism that does not have a nucleus or membrane-bound organelles.
eukaryote an organism made up of cells that contain their DNA in a nucleus.
cell theory lists three basic characteristics of all cells and organisms: • All organisms are made up of one or more cells. • The cell is the basic unit of all organisms. • All cells come from existing cells.
atom the matter that you encounter every day , both living and nonliving.
molecules a group of atoms that are held together by chemical bonds.
lipids a fat molecule or a molecule that has similar properties; do not mix with water; they have many jobs in cells, such as storing energy.
protein a molecule made up of smaller molecules called amino acids.
carbohydrates molecules that include sugars, starches, and fiber.
nucleic acid a molecule that carries information in cells.
phospholipid a lipid that contains phosphorus; form much of the cell membrane.
cytoskeleton a network of protein filaments that gives shape and support to cells; also involved in cell division and in movement.
mitochondrion cellular respiration occurs in this organelle.
ribosome the organelle that makes proteins by putting together chains of amino acids using instructions encoded in the cell’s DNA.
endoplasmic reticulum assists in the production, processing, and transport of proteins and in the production of lipids.
golgi complex the membrane-bound organelle that packages and distributes materials, such as proteins.
cell wall a rigid structure that surrounds the cell membrane, identified by the yellow line around the plant cell.
vacuole a fluid-filled found in the cells of most animals, plants, and fungi; may contain enzymes, nutrients, water, or wastes.
chloroplasts organelles where photosynthesis occurs.
lysosomes contain digestive enzymes, which break down worn-out or damaged organelles, waste materials, and foreign invaders in the cell.