cell membrane Flashcards
phospholipid does?
main component of membrane and forms phospholipid.
protein does?
embedded in the cell membrane and used for transport in & out of cell
Carb does?
Attached to phospholipid or proteins, used for cell identification
cholesterol does?
hydrophobic part of membrane, regulates fluidity of membrane
passive transport criteria
- no energy needed
- allows certain substances to pass thru
active transport criteria?
- needs energy
- controls movement of molecules.
diffusion diffs? (passive)
-high to low con
- moves down gradient
osmosis diffs? (passvie)
- diffusion of WATER across semipermeable membrane
- water move thru membrane or aquaporins
- move DOWN gradient
facilitated diffusion diffs? (passive)
- sometimes too big, use protein channel or carrier
- move molecs from HIGHER con to LOWER
- move down gradient
diff between facili and diffusion
simple: substance pass thru phospholipids
facili: use protein carrier
protein pump is?
uses ENERGY to move molecs from LOW to HIGH
- against gradient
- send signal in nervous system
carrier protein is?
- against gradient to transport substances in/out of cell
- active transport (need ATP)
endocytosis diffs?
- when cell takes in large amounts of small particles
- “eats” it basically
e.g. eats bacteria in immune sys
exocytosis diffs?
- cell sends materials out of cell thru vesicles
- basically secretes important proteins
e.g. insulin
Iso means…
same!
solution will stay the same
