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.
Didn't know it?
click below
Knew it?
click below
Don't know
Remaining cards (0)
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

Chapter 3

Cell Structure and Function

cell theory the major principles of this are: 1) all organisms are made of cells, 2) all existing cells are produced by other living cells, and 3) the cell is the most basic unit of life
cytoplasm a jellylike substance that contains dissolved molecular building blocks
organelle structures specialized to perform distinct processes within a cell
prokaryotic cell cells that do not have a nucleus or other membrane bound organelles
eukaryotic cell cells that do have a nucleus and other membrane bound organelles
cytoskeleton a network of proteins that is constantly changing to meet the needs of a cell
nucleus the storehouse for most of the genetic information (or DNA) in a cell
endoplasmic reticulum an interconnected network of then folded membranes
ribosome tiny organelles that link amino acids together to form proteins
Golgi apparatus closely layered stacks of membrane-enclosed spaces that process, sort, and deliver proteins
vesicle small membrane-bound sacs that divide some materials from the rest of the cytoplasm and transport these materials from place to place within the cell
mitochondrion the powerhouse of the cell; supplies energy to the cell
vacuole a fluid-filled sac used for the storage of materials needed by the cell
lysosome membrane-bound organelles that contain enzymes
centriole cylinder-shaped organelles made of short microtubules arranged in a circle
cell wall a rigid layer that gives protection, support, and shape to the cell (only present in plant cells)
chloroplast organelles that carry out photosynthesis
cell membrane the plasma membrane that forms a boundary between a cell and the outside environment and controls the passage of materials into and out of the cell
phospholipid a molecule composed of three basic part: a charged phosphate group, glycerol, and two fatty acid chains
fluid mosaic model a model that describes the arrangement of the molecules that make up a cell membrane
selective permeability the allowance of some but not all materials to cross
receptor a protein that detects a signal molecule and performs an action in response
passive transport the movement of molecules across a cell membrane without energy input from the cell
diffusion the movement of molecules in a fluid or gas from a region of higher concentration to a region of lower concentration
concentration gradient the difference in the concentration of a substance from one location to another
osmosis the process in which water molecules move across a semipermeable membrane from an area of higher water concentration to an area of lower water concentration
isotonic a type of solution that has the same concentration of dissolved particles as the cell
hypertonic a type of solution that has a higher concentration of dissolved particles than a cell
hypotonic a type of solution that has a lower concentration of dissolved particles than a cell
facilitated diffusion the diffusion of molecules across a membrane through transport proteins
active transport transport that drives molecules across a membrane from a region of lower concentration to a region of higher concentration
endocytosis the process of taking liquids or fairly large molecules into a cell by engulfing them in a membrane
phagocytosis a type of endocytosis in which the cell membrane engulfs large particles
exocytosis the release of substances out of a cell by the fusion of a vesicle with the membrane
Created by: tuohybio1415



Use these flashcards to help memorize information. Look at the large card and try to recall what is on the other side. Then click the card to flip it. If you knew the answer, click the green Know box. Otherwise, click the red Don't know box.

When you've placed seven or more cards in the Don't know box, click "retry" to try those cards again.

If you've accidentally put the card in the wrong box, just click on the card to take it out of the box.

You can also use your keyboard to move the cards as follows:

If you are logged in to your account, this website will remember which cards you know and don't know so that they are in the same box the next time you log in.

When you need a break, try one of the other activities listed below the flashcards like Matching, Snowman, or Hungry Bug. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out.

To see how well you know the information, try the Quiz or Test activity.

Pass complete!

"Know" box contains:
Time elapsed:
restart all cards