Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
14 Cards in this Set
- Front
- Back
_____ proteins extend into the lipid layer
|
integral
|
|
peripheral proteins associate with ____ lipids or ____ proteins
|
membrane lipids or peripheral proteins
|
|
peripheral proteins have 2 functions, what are they?
|
connect neighboring cells and account for the immunological properties of the cell.
|
|
what are the 3 basic structural elements of the cell membrane?
|
phospholipids
spingolipids cholesterol |
|
what are phoso/sphingolipids and cholesterol composed of?
|
polar head and non-polar tail
|
|
what is the basic structure of the cell membrane?
|
the bilayer
|
|
what is the role that cholestrol plays in the bilayer?
|
stabilizes and stiffens the membrane.
|
|
can ions pass through the lipid layer?
|
no only ions can
|
|
what is the cell membrane highly permeable to?
|
small molecules (neutral) and water
|
|
what is the cell membrane impermeable to?
|
ions and large molecules
|
|
why is there said spontaneous repair in the cell membrane?
|
because the amphiphatic molecules (phospholipids) are not chemically bound (phosphates) to each other. They are free to move around.
|
|
why is water accepted by the cell membrane so well?
|
because of its amphiphatic properties created by the distribution of H+ and O- ions.
|
|
what is selective permeability, what is it's function?
|
the cell membrane is selective to a particular substance to pass in/ out of the cell. The reason for this is to get waste out and keep valueable product in.
|
|
what is more permeable,. charged or neutral ions?
|
neutral ions
|