Active Transport Plasma Membrane Cell Processes Part 3

Active Transport �Three types: primary, secondary and endo/exocytosis �All use energy in some form �Goes against concentration gradient: low to high �Video: http: //www. youtube. com/watch? v=L 4 Tbi 1 qlt. U&safety_mode=true&persist_safety_mode=1

Primary Active Transport �Uses ATP to drive molecules across the membrane AGAINST their concentration gradient. �Molecules will move from areas of low concentration to high concentration. �Requires a protein transporter called a carrier that will bind ATP and move the molecule across the membrane. �Usually large/ charged/ or hydrophilic molecules �Video: http: //highered. mcgrawhill. com/sites/9834092339/student_view 0/chapter 5/p rimary_active_transport. html

Adensoine Triphosphate (ATP) �The molecule that provides chemical energy for primary active transport. �ATP binds to the carrier protein on the intracellular side and causes a change in shape that allows the target molecule to be transported against its concentration gradient by the carrier. �Video: http: //www. youtube. com/watch? v=bbtq. F 9 q_p Fw&safe=active

Secondary Active Transport �Uses potential energy from the concentration gradient of one molecule to drive the movement of a second molecule against its concentration gradient. �The target molecule moves against the concentration gradient and the co-transported molecule moves with its concentration gradient. �Requires a protein transporter called a carrier. �Video: http: //www. youtube. com/watch? v=6 xqf 6 RH 6 nk&safety_mode=true&persist_safety_mode=1

Co-transportation/Exploitative Transportation Symport Antiport �The target molecule and the co-transported molecule move in the same direction. �The target molecule is going against its gradient. �The co-transported molecule is going with its gradient. �The target molecule and the co-transported molecule move in opposite directions. �The target molecule is going against its gradient. �The co-transported molecule is going with its gradient.

Endo/Exocytosis Video: http: //www. youtube. com/watch? v=Du. Dmvlbpj. HQ&safe=active Endocytosis Exocytosis �Occurs when cell engulf material and bring it into the cell using a vesicle. �Uses energy in the form of ATP to move the vesicle into the cell. �Occurs when cells excrete material and move it outside of the cell using a vesicle. �Uses energy in the form of ATP to move the vesicle out of the cell.

Types of Endocytosis Phagocytosis Pinocytosis �Occurs when a cell engulfs solid material. �Examples: �Occurs when a cell engulf liquid material. �Examples:

Active Transport Overview Primary Secondary �Uses ATP for energy to drive molecules against their concentration gradient �Uses the potential energy of a co-transporter molecule to drive target molecules against their concentration gradient. �Can be symport or antiport. Review of Passive and Active Transport: http: //www. youtube. com/watch? v=d. PKv. Hr. D 1 e. S 4&safety_mode=tr ue&persist_safety_mode=1 http: //www. youtube. com/watch? v=r. R 7 NOSRyzh. M&safety_mode=t rue&persist_safety_mode=1