Active And Passive Transport Flashcards
Diffusion
The random movement of particles of a solute of an area of higher concentration to an area of lower concentration
Passive transport
Does not require energy
Ex. Diffusion osmosis and facilitated diffusion
How do particles move
Moves with the concentration gradient
Rate of transport depends on
If is is a solid liquid or gas
Size of molecule
Temperature
Osmosis
The diffusion of water through a selectively permeable membrane
How do water molecules move
Higher concentration of water to a lower concentration of water
Will move to a greater amount of solute cause there is less water there
Isotonic solutions
The concentration of salute inside an outside the cell is the same
Cell is in homeostasis
Molecules in equilibrium
Hypotonic solution
The concentration of solute is lower outside the cell than inside the cell
Water moves into the cell
Increase of pressure swell and burst animals called cytolysis
Gives plants shape and support
Hypertonic solution
The concentration of solute is higher outside the cell than inside
Have more water inside so moved out
Causes animal cells to shrivel and plants to wilt called plasmolysis
Facilitated diffusion
Moves with concentration gradient Uses channel proteins Passive transport For specifics molecules like glucose Stops at equilibrium
Aquaporins
Allows water to pass through them
Many cells have a lot of water channel proteins (Aquaporins)
Active transport
Requires energy from ATP
Moves against concentration gradient
Uses protein pump in membrane
Examples of active transport
Endocytosis. In
Exocytosis. Out
Endocytosis
Process of taking material into the cell by means of infolding, or pockets, of the cell membrane
Examples of Endocytosis
Pinocytosis and phagocytosis
