Active Transport

Question 1

Definition

Answer 1

The movement of substances from an area of low concentration to an area of high concentration against a concentration gradient

Question 2

What does it require?

Answer 2

ATP from respiration

Carrier proteins

Question 3

Steps of active transport

Answer 3

1. ions move and attach to carrier proteins which fit into them
2. Then the ATP lose a phosphate to move onto the Carrier protein and makes ATP into ADP
3. this phosylation changes the shape of the carrier proteins tertiary structure and releases the ion on the opposite side against the concentration gradient
4. Then the carrier protein returns to its original shape