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)