Question

Red blood cells need iron. They store iron and typically contain more iron than the fluid around them does. Which action would show the blood cells doing active transport?

A.pushing iron out
B.bringing iron in
C.swelling
D.shrinking

Answer 1

B


This is because the particles are going against the concentration gradient. From an area of low concentration to a higher concentration using energy.

Hope this helps!

Answer 2

B . bringing iron in