movement and cell membrane

Question	Answer
substances that move in	Oxygen water nutrients
Substances that move out	carbon dioxide wastes
hydrophilic	-face water environment -water liking
hydrophobic	-face each other -water repelling
phospholipid	lipid containing phosphate groups
fluid mosaic model of cell membrane Image: e948830a-eb79-424c-84aa-a24401f3b93e (image/jpg)	- Jonathan singer and garth nicholas in -protein molecules imbedded in lipid bilayer
functions of cell membrane structures: phospholipid Bilayer	acts as a barrier to ions
Embedded proteins	some help specific substances to cross membrane through protein pore
passive movement	expends no energy (diffusion and osmosis)
active movement	expends energy
diffusion	the movement of substances from a more concentrated to a less concentrated one
osmosis	diffusion of water across a semi-permeable membrane from an area where there is more water to an area where there is less.
concentration gradient	the difference in the number of particles compared to the number of particles in another area.
hypertonic (more)	more concentrated solution (more molecules outside) (sea water)
isotonic	same concentration
hypotonic	less concentrated solution (fresh water)

Resource summary

	Created by Jin Braicovic over 8 years ago