Using Energy to Move Substances

Uses ATP (ENERGY!!!) Moves substances from low to high

concentration Carrier proteins in cell membrane

“PUMP” things in & out (AA’s, Ions, Sugar) Many of these important substances have

a lower concentration outside the cell, so what would typically happen to them?

What can stop

this?

Na-K Pump

K IonsNa Ions

Pumps 3 Pumps 2

OUTOUT of cell INTOINTO cell

Prevents Na build-up in cell (toxic) Enter on their own via facilitated

diffusion Makes cell hypertonic Cell would gain water & lyse

Helps Glucose enter cell (Coupled Channel)