4.4 Active Transport

Question 1

What is active transport?

Answer 1

The movement of molecules or ions into or out of a cell from a region of lower concentration to a region of higher concentration using ATP and carrier proteins.

Question 2

Does active tranport go up or down the concentration gradient?

Answer 2

Up/ against the concetration gradient

Question 3

What metabolic energy is required for active transport?

Answer 3

ATP (adenine tri- phophate)

Question 4

What is an example of when active tranport is used?

Answer 4

• The uptake of water from root hair cells
• Through the cells from the bloodstream