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 4 Vocabulary

Osmosis the diffusion of water through a semipermeable membrane
Diffusion The movement of particles from regions of higher density to regions of lower density.
Passive Transport the movement of substances across a cell membrane without the use of energy by the cell
Active Transport The movement of substances across the cell membrane that requires the cell to use energy.
Endocytosis The process by which a cell membrane surrounds a particle and encloses the particle in a vesicle to bring the particle into the cell.
Exocytosis The process in which a cell releases a particle by enclosing the particle in a vesicle that then moves to the cell surface and fuses with the cell membrane.
Photosynthesis The process by which plants, algae, and some bacteria use sunlight, carbon dioxide, and water to make food.
Cellular Respiration The process by which cells use oxygen to produce energy from food.
Fermentation The breakdown of food without the use of oxygen
Chloroplast A cellular organelle that is found in plants where photosynthesis occurs.
ATP Adenosine Triphosphate, a molecule that acts as the main energy source for cell processes
Cell Membrane A cellular organelle that controls movement of particle in and out of the cell.
Concentration The strength of a solution; number of molecules of a substance in a given volume
Hypotonic Solution A solution that has less solute and more water than another solution
Hypertonic Solution A solution that has more water and less solute and another solution.
Equilibrium The state of balance or static
Created by: madisonnegley