Question

Easy question easy points here

QUESTION
SOME FOOD SUBSATNCES MOVE BACK INTO THE BLOOD THEOUGH DIFFUSION. WHAT DOES THIS MEAN ?​

Answer 1

i really dont know much of this but it may be talking ions srry i not very smart but i like helping! :D

Step-by-step explanation:

Answer 2

Diffusion is a net movement of molecules or ions from a region of higher concentration to a region of lower concentration down a concentration gradient at a random movement.

So food molecules to move into the blood stream because blood is a region that has a lower concentration of molecules.