*Unit 3 Part 5: Cell Transport Flashcards
Cells, Cell Transport, & Mitosis
Diffusion
Small particles moving from high to low concentration directly through the cell membrane.
Facilitated diffusion
Large particles moving from high to low concentration through a transport protein.
Osmosis
Water moving from areas of high to low concentration through a semi-permeable membrane.
Generic active transport
ATP used to move particles from low to high concentration through a transport protein.
Exocytosis
Vesicles surround particles and move them out of the cell.
Endocytosis
Membrane pinched inward to bring particles into the cell.
Is diffusion passive or active?
Passive
Is facilitated diffusion passive or active?
Passive
Is osmosis passive or active?
Passive
Is generic active transport passive or active?
Active
Is exocytosis passive or active?
Active
Is endocytosis passive or active?
Active
Is a protein needed for diffusion?
No
Is a protein needed for facilitated diffusion?
Yes
Is a protein needed for osmosis?
No
Is a protein needed for generic active transport?
Yes
Is a protein needed for exocytosis?
No
Is a protein needed for endocytosis?
No
Is ATP needed for diffusion?
No
Is ATP needed for facilitated diffusion?
No
Is ATP needed for osmosis?
No
Is ATP needed for generic active transport?
Yes
Is ATP needed for exocytosis?
Yes
Is ATP needed for endocytosis?
Yes
Does diffusion go against or down the concentration gradient?
Down the concentration gradient (high to low)
Does facilitated diffusion go against or down the concentration gradient?
Down the concentration gradient (high to low)
Does osmosis go against or down the concentration gradient?
Down the concentration gradient (high to low)
Does generic active transport go against or down the concentration gradient?
Against the concentration gradient (low to high)
Does exocytosis go against or down the concentration gradient?
Either
Does endocytosis go against or down the concentration gradient?
Either
Concentraction gradient
The difference in concentration inside the cell vs. outside
Passive transport
Materials can move down concentration gradient on their own
Active transport
Cells must use energy to move materials from low concentration to high
Dynamic equilibrium
Molecules continue to move back and forth equally but there is no net change in concentration
Through passive transport, molecules will reach _____ where the concentration inside is the _____ as outside the cell.
equilibrium; same
Protein pump
Membrane protein uses energy to move materials
Pinocytosis
Liquids in
Phagocytosis
Solids in