Cell Transport
The energy for active transport comes from
ATP (adenosine triphospate)
Adenosine Triphosphate
Abbreviated ATP
direction of passive transport
high to low
transport protein (or protein channel)
an embedded protein that helps a certain type of substance to cross the membrane using facilitated diffusion
Passive Transport
molecules move with the concentration gradient from high to low concentration NO energy required.
Endocytosis
movement of substances into the cell by creating a new vacuole (vesicle) at the cell membrane. requires energy.
Exocytosis
movement of substances out of a cell by merging a vacuole (vesicle) with the cell membrane. requires energy.
direction of active transport
low to high
Osmosis
Diffusion of water molecules across a selectively permeable membrane
Selectively pemeable membrane
A membrane that allows certain materials to pass through, but not others
Cell Membrane
controls what goes in an out of the cell
Hydrophobic
water hating (part of the phospholipid bilayer, the tail, that is repels water)
Hydrophilic
water loving (part of the phospholipid bilayer, the head, that is attracted to water)
Types of Passive Transport
Diffusion, Osmosis and Facilitated Diffusion
Types of Active Transport
Endocytosis, Exocytosis, and Protein Pumps - Lower Concentration to Higher Concentration
Simple diffusion (pic)
Particles (not water) moving through a membrane from high concentration to low concentration
Active Transport
Movement of molecules or ion into or out of the cell against its concentration gradient (from low to high) and requires energy.
Diffusion (Simple)
Movement of particles or molecules from an area of high concentration to an area of low concentration
Cell membrane protein pump
These transport from low to high concentration Requiring the expenditure of energy (ATP).
Facilitated Diffusion
Use of protein channels for diffusion, does not require energy for a molecule to travel across the membrane, moves molecules from high to low solute concentration
left, right, osmosis
Water will move from the _____ to the _____ by _____.
right, left, osmosis
Water will move from the _____ to the _____ by _____.
Osmosis
What type of transport is pictured?
Facilitated diffusion and Active transport (protein pump)
What type of transport uses proteins to move particles in and out of the cell?
ATP
the molecule that provides energy for cellular processes by breaking a bond (ENERGY)