Save
Busy. Please wait.
Log in with Clever
or
show password
Forgot Password?
Don't have an account?  Sign up 
Sign up using Clever
or
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. Your email address is only used to allow you to reset your password. See 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
edit
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

Cell Function (4)

transport across cell membrane

QuestionAnswer
what does the cell membrane do? Encloses contents of cell and allows cytosol (water substance) to have different composition by allowing substances to move in and outside the cell.
Is the cell wall semipermeable? Yes, it allows some dissolved substances to move through it, but not others.
What do the cell membrane's structures allow? Larger particles to pass through it and allows movement against the concentration gradient and cytosol have different composition.
What is the cell membrane made up of? A double layer of phospholipids/bilayer of phospholipids.
What are Phospholipids? A major type of lipid (lipids - fats, oils or waxes).
What are the two different processes that transport dissolved substances across the membrane? Passive Transport and Active Transport.
Does Passive Transport require energy? No
What is Diffusion? The movement of molecules from a region of high concentration to a region of low concentration. Requires no energy
What is Channel Meditated Diffusion? When substances are to big to move across the membrane and are assisted by protein channels. Move from high to low and requires no energy?
What is Carrier Mediated Diffusion? When substances are required by cell but are to large to move across the membrane and are assisted by carrier molecules. Move from high to low and requires no energy.
What is Active Transport? When substances move across the membrane against the concentration gradient. This process does require energy.
What are the 3 types of Passive Transport? Diffusion, Channel mediated and Carrier Mediated.
Created by: zarap103
Popular Biology sets

 

 



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