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Question 1

True or false? Materials diffuse from the blood into the tissue fluid up a concentration gradient.

Answer 1

false; In diffusion, materials move down a concentration gradient. After eating, there is a higher concentration of dissolved materials in the blood than in the tissue fluid; materials diffuse from the blood into the tissue fluid down a concentration gradient.

Question 2

Fick’s law explains that diffusion happens faster because there is a greater __________ __________. What two words complete the sentence?

Answer 2

concentration gradient