Save
Busy. Please wait.
or

show password
Forgot Password?

Don't have an account?  Sign up 
or

Username is available taken
show password

why


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.
focusNode
Didn't know it?
click below
 
Knew it?
click below
Don't know
Remaining cards (0)
Know
0:00
share
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

Biology Ch.3

Biology Ch. 3

TermDefinition
cell theory All organisms are made of cells; All existing cells are produced by other living cells; The cell is the most basic unit of life.
cytoplasm A jellylike fluid that fills the inside of a cell.
organelle Structures specialized to perform distinct processes within a cell.
prokaryotic cell A cell without a nucleus or other membrane-bound organelles.
eukaryotic cell A cell with a nucleus and other membrane-bound organelles
cell membrane Double-layer of phospholipids that forms a boundary between a cell and the surrounding environment and controls the passage of materials into and out of a cell.
fluid mosaic model Model that describes the arrangement and movement of the molecules that make up a cell membrane.
selective permeability Condition or quality of allowing some, but not all, materials to cross a barrier or membrane
diffusion Movement of dissolved molecules in a fluid or gas from a region of higher concentration to a region of lower concentration.
concentration gradient Difference in the concentration of a substance from one location to another
osmosis Diffusion of water molecules across a semipermeable membrane from an area of higher water concentration to an area of lower water concentration.
isotonic Solution that has an equal concentration of dissolved particles compared with another solution.
hypertonic Solution that has a higher concentration of dissolved particles compared with another solution.
hypotonic Solution that has a lower concentration of dissolved particles compared with another solution.
active transport Energy-requiring movement of molecules across a membrane from a region of lower concentration to a region of higher concentration.
Created by: Mr.Devine
 

 



Voices

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:
Retries:
restart all cards