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.
Don't know
Know
remaining cards
Save
0:01
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:
Retries:
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

Membrane Transport

QuestionAnswer
What are the 5 ways of transport across a membrane? Diffusion, Osmosis, Active Transport, Exocytosis and Endocytosis
What is Diffusion? The net movement of molecules or ions from regions of high concentration to low concentrations
When will diffusion stop? When an Equilibrium is reached
Does Diffusion use ATP? NO it is a passive movement
What are some of the molecules that can easily be diffused across the cell membrane? Oxygen and Carbon Dioxide
What is facilitated diffusion? When larger hydrophilic molecules and ions are move through proteins, across the phospholipid bilayer.
What proteins are involved in facilitated diffusion? Channel proteins and Carrier Proteins
What is the role of Channel proteins in facilitated diffusion? Channel proteins have a specific shape that allows a specific molecule through.
What is the role of Carrier proteins in facilitated diffusion? Carrier proteins have a specific site, that allows molecules to bind on to them. They they change shape and allows the molecule or ion to pass across the membrane.
Why is diffusion passive? Because no ATP or metabolic energy is needed for the transport.
What is osmosis? The net movement of water molecules from a high concentration to a low concentration of water molecules.
When will osmosis stop? When an Equilibrium is reached.
Is energy needed for osmosis to take place? NO
What is the membrane called that osmosis takes place over? Partially- permeable membrane
What is Active Transport? The movement of molecules across the cell membrane, against the concentration gradient (From low to high)
Why is energy needed in Active Transport? Because substances need to be moved against the concentration gradient.
What proteins are involved in Active Transport? Carrier Proteins
How are carrier proteins used in Active Transport? Substances bind to the carrier proteins, and energy from ATP changes the shape of the protein, causing the substance to be released inside of the membrane
What is Endocytosis? The movement of large particles across the cell surface membrane into the cell
What is Exocytosis? The movement of large particles across the cell surface membrane out of the cell
Created by: stu036791