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 5 Stack

Active Transport the movement of materials across a membrane through the use of cellular energy, normally against a concentration gradient.
Aquaporins “water pores”; specialized water channels.
Attachment Protein anchor the cell membrane in various ways, such as binding the plasma membrane to the network of protein filaments within the cytoplasm (cytoskeleton).
Carrier Protein a membrane protein that facilitates the diffusion of specific substances across the membrane. The molecule to be transported binds to the outer surface of the carrier protein; the protein then changes shape, allowing the molecule to move across the membra
Channel Protein a membrane protein that forms a channel or pore completely through the membrane and that is usually permeable to one or to a few water-soluble molecules, especially ions.
Concentration the number of particles of a dissolved substance in a given unit of volume.
Concentration Gradient the difference in concentration of a substance between two parts of a fluid or across a barrier such as a membrane.
Desmosome a strong cell-to-cell junction that attaches adjacent cells to one another.
Diffusion the net movement of particles from a region of high concentration of that particle to a region of low concentration, driven by the concentration gradient; may occur entirely within a fluid or across a barrier such as a membrane.
Endocytosis the process in which the plasma membrane engulfs extracellular material, forming membrane-bound sacs that enter the cytoplasm and thereby move material into the cell.
Enzyme a protein catalyst that speeds up the rate of specific biological reactions.
Exocytosis the process in which intracellular material is enclosed within a membrane-bound sac that moves to the plasma membrane and fuses with it, releasing the material outside the cell.
Facilitated Diffusion the diffusion of molecules across a membrane, assisted by protein pores or carriers embedded in the membrane.
Fluid a liquid or gas.
Fluid Mosaic Model a model of membrane structure; according to this model, membranes are composed of a double layer of phospholipids in which various proteins are embedded. The phospholipid bilayer is a somewhat fluid matrix that allows the movement of proteins within it.
Gap Junction a type of cell-to-cell junction in animals in which channels connect the cytoplasm of adjacent cells.
Glycoprotein a protein to which a carbohydrate is attached.
Gradient a difference in concentration, pressure, or electrical charge between two regions.
Hypertonic referring to a solution that has a higher concentration of dissolved particles (and therefore a lower concentration of free water) than has the cytoplasm of a cell.
Isotonic referring to a solution that has the same concentration of dissolved particles (and therefore the same concentration of free water) as has the cytoplasm of a cell.
Osmosis the diffusion of water across a differentially permeable membrane, normally down a concentration gradient of free water molecules. Water moves into the solution that has a lower concentration of free water from a solution with the higher concentration of
Passive Transport the movement of materials across a membrane down a gradient of concentration, pressure, or electrical charge without using cellular energy.
Phagocytosis a type of endocytosis in which extensions of a plasma membrane engulf extracellular particles and transport them into the interior of the cell.
Phospholipid Bilayer a double layer of phospholipids that forms the basis of all cellular membranes. The phospholipid heads, which are hydrophilic, face the water of extracellular fluid or the cytoplasm; the tails, which are hydrophobic, are buried in the middle of the bilaye
Pinocytosis the non selective movement of extracellular fluid, enclosed within a vesicle formed from the plasma membrane, into a cell.
Plasmodesmata a cell-to-cell junction in plants that connects the cytoplasm of adjacent cells.
Plasmolysis a process in which the central vacuole and cytosol of each plant cell loses water and the plasma membrane shrinks away from its cell wall as the vacuole collapses.
Receptor-Mediated Endocytosis the selective uptake of molecules from the extracellular fluid by binding to a receptor located at a coated pit on the plasma membrane and pinching off the coated pit into a vesicle that moves into the cytoplasm.
Receptor Protein a protein, located on a membrane (or in the cytoplasm), that recognizes and binds to specific molecules. Binding by receptor proteins typically triggers a response by a cell, such as endocytosis, increased metabolic rate, or cell division.
Recognition Protein a protein or glycoprotein protruding from the outside surface of a plasma membrane that identifies a cell as belonging to a particular species, to a specific individual of that species, and in many cases to one specific organ within the individual.
Selectively Permeable the quality of a membrane that allows certain molecules of ions to move through it more readily than others.
Simple Diffusion The diffusion of water, dissolved gases, or liquid-soluble molecules through the phospholipid bilayer of a cellular membrane.
Solute a substance that can be dissolved
Solvent a liquid capable of dissolving (uniformly dispersing) other substances in itself.
Tight Junction a type of cell-to-cell junction in animals that prevents the movement of materials through the spaces between cells.
Transport Protein a protein that regulates the movement of water-soluble molecules through the plasma membrane.
Turgor Pressure pressure developed within a cell (especially the central vacuole of plant cells) as a result of osmotic water entry.
Created by: maddiereynolds



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