Cell Transport

Process that REQUIRES energy-endocytosis (IN) and exocytosis (OUT). The cell has to use some of its energy to move things in and out, and the energy used is ATP. Moves a substance from low to high concentrations (like running up a hill... you need energy to do that)

• Active Transport

• Protein Pump

• Sodium-Potassium Pump

• Exocytosis

Describes the structure and function of the cell membrane; includes the phospholipid bilayer, proteins, carbohydrates, and cholesterol. The protein and cholesterol molecules are embedded within the lipid bilayer; they help provide additional structure and stability.

• Fluid Mosaic Model

• Passive Transport

• Active Transport

• Diffusion

Does not require energy; osmosis and diffusion

• phospholipid bilayer

• concentration gradient

• passive transport

• active transport

two layers of phospholipid molecules arranged tail-to-tail that help make up cell membranes. Bi=two

• passive transport

• active transport

• diffusion

• phospholipid bilayer

a difference in the concentration of ions or other dissolved particles between two regions

• concentration gradient

• diffusion

• facillitated diffusion

• transport proteins

movement of molecules from an area of high concentration to an area of lower concentration (NO ENGERY)

• diffusion

• concentration gradient

• Facilitated Diffusion

• Transport Proteins

having equal concentrations as molecules move into and out of the cell at the same time rate (EQUAL)

• facilitated diffusion

• Dynamic Equilibrium

• Transport Proteins

• concentration gradient

the diffusion molecules across a membrane through special proteins in the membrane to transport small particles such as ions and water across the membrane

• facilitated diffusion

• transport proteins

• concentration gradient

• fluid mosaic model

proteins which are present in the cell membrane that allow different types of substances to pass through the membrane

• active transport

• active transport

• passive transport

• transport proteins

acts as a pore that is embedded within the membrane, allowing things to move with the concentration gradient across the cell membrane. Water cannot diffuse directly through the cell membrane because water is a polar molecule; water moves through specific channels called aquaporins.

• Protein Channel

• Carrier Proteins

• Osmosis

• Hypotonic