homeostasis
Passive Transport is the movement of molecules with the concentration gradient
active transport:moves against the gradient
moves from high to low
and requires ATP_
- protein pumps:works against the gradient and requires atp
Movement from high to low.
Diffusion: Movement from high concentration to low concentration
- endocytosis: the movement of the cell membrane to bring molecules into the cell
- exocytosis: Fusing of the cell membrane with the vesicle to remove molecules from the cell
Facilitated diffusion: Diffusion of large molecules, needs help from membrane protein
Osmosis: movement of water across membrane from high to low
cell membrane
controls what enters and exits the cell
Tonicity
properties that help it are...
Hypertonic: More concentration outside of the cell . Causes cell to shrink
- it is flexible
2.selectively permeable
3.makes lipids and protein
- self sealing
Hypotonic: Less concentration on the outside of the cell. Causes cell to swell
- helps maintain homeostasis
Isotonic: The same amount of concentration inside and outside of cell. Cell will not change