Cel l Tr anspor t
No Protein
Purpose: MaintainHomeostasis
Diff usion
Tranport of ANY substance
down its concentration
gradient
Simple
Diff usion
- Small, nonpolar molecules
- Go through the cell membrane directly OR
spread out in a space without a cell membrane
Yes Protein
Facilitated
Diff usion
- Larger molecules or ions or ionic compounds
- Travel through a membrane protein
Passive
Transport
[ High] - > [ Low]
Down the concentration gradient
No energy
Hypertonic
solution
High [ solute] in the solution
Osmosis
Cell Transport
Diff usion of water through a semi- permeable membrane
Active
Transport
Water travel fromanarea of ___ toanarea of ___
- High [water] -->low[water]
- Low[solute] -->high [solute]
- Hypotonic -->hypertonic
[ Low] - > [ High]
Against the concentration gradient
Requires energy
Requires membrane protein
Hypotonic
solution
Low [ solute] in the solution
Isotonic
solution
Same [ solute] in the solution
vs. in the cell