Active Transports Active Transports NotesNotes

Active TransportActive Transport Active Transport: Active Transport:

movement of movement of substances up their substances up their concentration concentration gradient (low gradient (low concentration to high concentration to high concentration); concentration); requires ENERGY requires ENERGY

Active TransportActive Transport

Endocytosis and Exocytosis: Endocytosis and Exocytosis: transport transport large substances across the cell large substances across the cell membrane.membrane.

All active transports use ATP as energy.All active transports use ATP as energy.

EndocytosisEndocytosis1. 1. EndocytosisEndocytosis:: process process

by which cells by which cells ingest ingest external fluid, external fluid, macromolecules and macromolecules and large particles.large particles.

PinocytosisPinocytosis – cellular – cellular drinkingdrinking

PhagocytosisPhagocytosis – cellular – cellular eatingeating

ExocytosisExocytosis ExocytosisExocytosis: the : the

processes of moving processes of moving large molecules (like large molecules (like proteins) out of the cell.proteins) out of the cell.

Ex. Ex. Proteins may be Proteins may be releasedreleased

Golgi body packages Golgi body packages protein into a vesicle protein into a vesicle (bubble).(bubble).

ER (Rough) transports ER (Rough) transports the vesicle to the cell the vesicle to the cell membrane for export.membrane for export.

Inside CellOutside cell

ExocytosisExocytosis Golgi body packages protein into a Golgi body packages protein into a

vesicle (bubble) so it can be transported.vesicle (bubble) so it can be transported. ER (Rough) then transports the vesicle to ER (Rough) then transports the vesicle to

the cell membrane for export.the cell membrane for export.

Inside Cell

Outside cell

PurposePurpose Cells work together to make sure each Cells work together to make sure each

one has enough protein and other one has enough protein and other macromolecules to function correctly macromolecules to function correctly (Homeostasis).(Homeostasis).