B1.9 - Active Transport (Finished as long as how it works is not needed to know)

Question 1

Active transport moves substances ___ the concentration gradient and so ________ energy.

Answer 1

Against, requires

Question 2

What is active transport?

Answer 2

The movement of substances against the concentration gradient across a membrane

Question 3

Why do root hair cells need active transport?

Answer 3

As mineral ions in the soil are usually found in very dilute solutions so they need to be moved against the concentration gradient

Question 4

Why does digestion need active transport?

Answer 4

To move (e.g. glucose) from the gut to the bloodstream